new_tab_ui.cc revision c2e0dbddbe15c98d52c4786dac06cb8952a8ae6d
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/new_tab_ui.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <set> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/i18n/rtl.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/lazy_instance.h" 112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/memory/scoped_ptr.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/metrics/histogram.h" 132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/prefs/pref_service.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/utf_string_conversions.h" 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/profiles/profile.h" 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/metrics_handler.h" 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/favicon_webui_handler.h" 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/foreign_session_handler.h" 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/most_visited_handler.h" 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/ntp_resource_cache.h" 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/ntp_resource_cache_factory.h" 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/recently_closed_tabs_handler.h" 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/common/chrome_notification_types.h" 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/common/pref_names.h" 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/common/url_constants.h" 262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "components/user_prefs/pref_registry_syncable.h" 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/browser/browser_thread.h" 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/browser/notification_service.h" 29c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include "content/public/browser/render_process_host.h" 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/browser/render_view_host.h" 312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "content/public/browser/url_data_source.h" 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/browser/web_contents.h" 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/browser/web_ui.h" 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "grit/browser_resources.h" 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "grit/generated_resources.h" 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/base/l10n/l10n_util.h" 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if !defined(OS_ANDROID) 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/app_launcher_handler.h" 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/new_tab_page_handler.h" 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/new_tab_page_sync_handler.h" 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/ntp_login_handler.h" 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/suggestions_page_handler.h" 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/android/bookmarks_handler.h" 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/android/context_menu_handler.h" 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/android/new_tab_page_ready_handler.h" 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/ui/webui/ntp/android/promo_handler.h" 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#if defined(ENABLE_THEMES) 522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "chrome/browser/ui/webui/theme_handler.h" 532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#endif 542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 55c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#if defined(USE_ASH) 56c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include "chrome/browser/ui/host_desktop.h" 57c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#endif 58c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using content::BrowserThread; 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using content::RenderViewHost; 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using content::WebUIController; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The amount of time there must be no painting for us to consider painting 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// finished. Observed times are in the ~1200ms range on Windows. 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const int kTimeoutMs = 2000; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Strings sent to the page via jstemplates used to set the direction of the 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// HTML document based on locale. 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const char kRTLHtmlTextDirection[] = "rtl"; 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const char kLTRHtmlTextDirection[] = "ltr"; 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static base::LazyInstance<std::set<const WebUIController*> > g_live_new_tabs; 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/////////////////////////////////////////////////////////////////////////////// 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// NewTabUI 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)NewTabUI::NewTabUI(content::WebUI* web_ui) 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : WebUIController(web_ui), 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) showing_sync_bubble_(false) { 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_live_new_tabs.Pointer()->insert(this); 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->OverrideTitle(l10n_util::GetStringUTF16(IDS_NEW_TAB_TITLE)); 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We count all link clicks as AUTO_BOOKMARK, so that site can be ranked more 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // highly. Note this means we're including clicks on not only most visited 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // thumbnails, but also clicks on recently bookmarked. 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->SetLinkTransitionType(content::PAGE_TRANSITION_AUTO_BOOKMARK); 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!GetProfile()->IsOffTheRecord()) { 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->AddMessageHandler(new browser_sync::ForeignSessionHandler()); 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->AddMessageHandler(new MostVisitedHandler()); 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->AddMessageHandler(new RecentlyClosedTabsHandler()); 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->AddMessageHandler(new MetricsHandler()); 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if !defined(OS_ANDROID) 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->AddMessageHandler(new NewTabPageHandler()); 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (NewTabUI::IsDiscoveryInNTPEnabled()) 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->AddMessageHandler(new SuggestionsHandler()); 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Android doesn't have a sync promo/username on NTP. 1022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) web_ui->AddMessageHandler(new NewTabPageSyncHandler()); 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (ShouldShowApps()) { 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ExtensionService* service = GetProfile()->GetExtensionService(); 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We might not have an ExtensionService (on ChromeOS when not logged in 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // for example). 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (service) 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->AddMessageHandler(new AppLauncherHandler(service)); 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->AddMessageHandler(new FaviconWebUIHandler()); 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_ANDROID) 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // These handlers are specific to the Android NTP page. 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->AddMessageHandler(new BookmarksHandler()); 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->AddMessageHandler(new ContextMenuHandler()); 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->AddMessageHandler(new NewTabPageReadyHandler()); 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!GetProfile()->IsOffTheRecord()) 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->AddMessageHandler(new PromoHandler()); 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Android uses native UI for sync setup. 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (NTPLoginHandler::ShouldShow(GetProfile())) 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui->AddMessageHandler(new NTPLoginHandler()); 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#if defined(ENABLE_THEMES) 1302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // The theme handler can require some CPU, so do it after hooking up the most 1312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // visited handler. This allows the DB query for the new tab thumbs to happen 1322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // earlier. 1332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) web_ui->AddMessageHandler(new ThemeHandler()); 1342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#endif 1352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) scoped_ptr<NewTabHTMLSource> html_source(new NewTabHTMLSource( 1372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) GetProfile()->GetOriginalProfile())); 1382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // These two resources should be loaded only if suggestions NTP is enabled. 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) html_source->AddResource("suggestions_page.css", "text/css", 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NewTabUI::IsDiscoveryInNTPEnabled() ? IDR_SUGGESTIONS_PAGE_CSS : 0); 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (NewTabUI::IsDiscoveryInNTPEnabled()) { 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) html_source->AddResource("suggestions_page.js", "application/javascript", 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IDR_SUGGESTIONS_PAGE_JS); 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // content::URLDataSource assumes the ownership of the html_source. 1472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) content::URLDataSource::Add(GetProfile(), html_source.release()); 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pref_change_registrar_.Init(GetProfile()->GetPrefs()); 1502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) pref_change_registrar_.Add(prefs::kShowBookmarkBar, 1512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::Bind(&NewTabUI::OnShowBookmarkBarChanged, 1522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::Unretained(this))); 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)NewTabUI::~NewTabUI() { 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_live_new_tabs.Pointer()->erase(this); 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The timer callback. If enough time has elapsed since the last paint 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// message, we say we're done painting; otherwise, we keep waiting. 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void NewTabUI::PaintTimeout() { 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The amount of time there must be no painting for us to consider painting 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // finished. Observed times are in the ~1200ms range on Windows. 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::TimeTicks now = base::TimeTicks::Now(); 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((now - last_paint_) >= base::TimeDelta::FromMilliseconds(kTimeoutMs)) { 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Painting has quieted down. Log this as the full time to run. 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::TimeDelta load_time = last_paint_ - start_; 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int load_time_ms = static_cast<int>(load_time.InMilliseconds()); 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) content::NotificationService::current()->Notify( 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) chrome::NOTIFICATION_INITIAL_NEW_TAB_UI_LOAD, 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) content::Source<Profile>(GetProfile()), 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) content::Details<int>(&load_time_ms)); 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_TIMES("NewTabUI load", load_time); 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Not enough quiet time has elapsed. 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Some more paints must've occurred since we set the timeout. 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Wait some more. 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) timer_.Start(FROM_HERE, base::TimeDelta::FromMilliseconds(kTimeoutMs), this, 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &NewTabUI::PaintTimeout); 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void NewTabUI::StartTimingPaint(RenderViewHost* render_view_host) { 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) start_ = base::TimeTicks::Now(); 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) last_paint_ = start_; 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) content::NotificationSource source = 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) content::Source<content::RenderWidgetHost>(render_view_host); 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!registrar_.IsRegistered(this, 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) content::NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE, 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) source)) { 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) registrar_.Add( 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) this, 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) content::NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE, 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) source); 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) timer_.Start(FROM_HERE, base::TimeDelta::FromMilliseconds(kTimeoutMs), this, 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &NewTabUI::PaintTimeout); 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void NewTabUI::RenderViewCreated(RenderViewHost* render_view_host) { 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StartTimingPaint(render_view_host); 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void NewTabUI::RenderViewReused(RenderViewHost* render_view_host) { 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StartTimingPaint(render_view_host); 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void NewTabUI::Observe(int type, 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const content::NotificationSource& source, 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const content::NotificationDetails& details) { 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (type) { 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case content::NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE: { 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) last_paint_ = base::TimeTicks::Now(); 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) default: 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(false) << "Unexpected notification: " << type; 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void NewTabUI::OnShowBookmarkBarChanged() { 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StringValue attached( 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) GetProfile()->GetPrefs()->GetBoolean(prefs::kShowBookmarkBar) ? 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) "true" : "false"); 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) web_ui()->CallJavascriptFunction("ntp.setBookmarkBarAttached", attached); 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 231c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)void NewTabUI::RegisterUserPrefs(user_prefs::PrefRegistrySyncable* registry) { 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if !defined(OS_ANDROID) 2332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) AppLauncherHandler::RegisterUserPrefs(registry); 2342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) NewTabPageHandler::RegisterUserPrefs(registry); 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (NewTabUI::IsDiscoveryInNTPEnabled()) 2362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SuggestionsHandler::RegisterUserPrefs(registry); 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 2382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) MostVisitedHandler::RegisterUserPrefs(registry); 2392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) browser_sync::ForeignSessionHandler::RegisterUserPrefs(registry); 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool NewTabUI::ShouldShowApps() { 244c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// Ash shows apps in app list thus should not show apps page in NTP4. 245c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// Android does not have apps. 2462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#if defined(OS_ANDROID) 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 248c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#elif defined(USE_ASH) 249c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return chrome::GetActiveDesktop() != chrome::HOST_DESKTOP_TYPE_ASH; 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 251c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return true; 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool NewTabUI::IsDiscoveryInNTPEnabled() { 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // TODO(beaudoin): The flag was removed during a clean-up pass. We leave that 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // here to easily enable it back when we will explore this option again. 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void NewTabUI::SetUrlTitleAndDirection(DictionaryValue* dictionary, 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const string16& title, 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const GURL& gurl) { 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dictionary->SetString("url", gurl.spec()); 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool using_url_as_the_title = false; 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) string16 title_to_set(title); 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (title_to_set.empty()) { 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) using_url_as_the_title = true; 2725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) title_to_set = UTF8ToUTF16(gurl.spec()); 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We set the "dir" attribute of the title, so that in RTL locales, a LTR 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // title is rendered left-to-right and truncated from the right. For example, 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the title of http://msdn.microsoft.com/en-us/default.aspx is "MSDN: 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Microsoft developer network". In RTL locales, in the [New Tab] page, if 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the "dir" of this title is not specified, it takes Chrome UI's 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // directionality. So the title will be truncated as "soft developer 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // network". Setting the "dir" attribute as "ltr" renders the truncated title 2825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // as "MSDN: Microsoft D...". As another example, the title of 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // http://yahoo.com is "Yahoo!". In RTL locales, in the [New Tab] page, the 2845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // title will be rendered as "!Yahoo" if its "dir" attribute is not set to 2855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // "ltr". 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string direction; 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!using_url_as_the_title && 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::i18n::IsRTL() && 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::i18n::StringContainsStrongRTLChars(title)) { 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) direction = kRTLHtmlTextDirection; 2915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) direction = kLTRHtmlTextDirection; 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dictionary->SetString("title", title_to_set); 2955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dictionary->SetString("direction", direction); 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 2992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)NewTabUI* NewTabUI::FromWebUIController(WebUIController* ui) { 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!g_live_new_tabs.Pointer()->count(ui)) 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return NULL; 3025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return static_cast<NewTabUI*>(ui); 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Profile* NewTabUI::GetProfile() const { 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Profile::FromWebUI(web_ui()); 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/////////////////////////////////////////////////////////////////////////////// 3105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// NewTabHTMLSource 3115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)NewTabUI::NewTabHTMLSource::NewTabHTMLSource(Profile* profile) 3132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) : profile_(profile) { 3142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 316c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)std::string NewTabUI::NewTabHTMLSource::GetSource() const { 3172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return chrome::kChromeUINewTabHost; 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void NewTabUI::NewTabHTMLSource::StartDataRequest( 3212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const std::string& path, 322c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) int render_process_id, 323c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) int render_view_id, 3242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const content::URLDataSource::GotDataCallback& callback) { 3255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 3265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::map<std::string, std::pair<std::string, int> >::iterator it = 3285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) resource_map_.find(path); 3295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (it != resource_map_.end()) { 3305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scoped_refptr<base::RefCountedStaticMemory> resource_bytes( 3315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) it->second.second ? 3325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ResourceBundle::GetSharedInstance().LoadDataResourceBytes( 3335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) it->second.second) : 3345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) new base::RefCountedStaticMemory); 3352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) callback.Run(resource_bytes); 3365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!path.empty() && path[0] != '#') { 3405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // A path under new-tab was requested; it's likely a bad relative 3415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // URL from the new tab page, but in any case it's an error. 3425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // TODO(dtrainor): Can remove this #if check once we update the 3445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // accessibility script to no longer try to access urls like 3455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // '?2314124523523'. 3465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // See http://crbug.com/150252. 3475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if !defined(OS_ANDROID) 3485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED() << path << " should not have been requested on the NTP"; 3495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 350c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) callback.Run(NULL); 3515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 354c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) content::RenderProcessHost* render_host = 355c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) content::RenderProcessHost::FromID(render_process_id); 356c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) bool is_incognito = render_host->GetBrowserContext()->IsOffTheRecord(); 3575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scoped_refptr<base::RefCountedMemory> html_bytes( 3585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NTPResourceCacheFactory::GetForProfile(profile_)-> 3595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) GetNewTabHTML(is_incognito)); 3605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) callback.Run(html_bytes); 3625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)std::string NewTabUI::NewTabHTMLSource::GetMimeType(const std::string& resource) 3655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const { 3665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::map<std::string, std::pair<std::string, int> >::const_iterator it = 3675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) resource_map_.find(resource); 3685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (it != resource_map_.end()) 3695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return it->second.first; 3705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return "text/html"; 3715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool NewTabUI::NewTabHTMLSource::ShouldReplaceExistingSource() const { 3745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 3755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)bool NewTabUI::NewTabHTMLSource::ShouldAddContentSecurityPolicy() const { 3782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return false; 3792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void NewTabUI::NewTabHTMLSource::AddResource(const char* resource, 3825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* mime_type, 3835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int resource_id) { 3845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(resource); 3855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(mime_type); 3865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) resource_map_[std::string(resource)] = 3875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::make_pair(std::string(mime_type), resource_id); 3885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)NewTabUI::NewTabHTMLSource::~NewTabHTMLSource() {} 391