content_constants.h revision 1e9bf3e0803691d0a228da41fc608347b6db4340 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// A handful of resource-like constants related to the Content application.
6
7#ifndef CONTENT_PUBLIC_COMMON_CONTENT_CONSTANTS_H_
8#define CONTENT_PUBLIC_COMMON_CONTENT_CONSTANTS_H_
9
10#include <stddef.h>         // For size_t
11
12#include "base/files/file_path.h"
13#include "content/common/content_export.h"
14
15namespace content {
16
17// The name of the directory under BrowserContext::GetPath where the AppCache is
18// put.
19CONTENT_EXPORT extern const base::FilePath::CharType kAppCacheDirname[];
20// The name of the directory under BrowserContext::GetPath where Pepper plugin
21// data is put.
22CONTENT_EXPORT extern const base::FilePath::CharType kPepperDataDirname[];
23
24// The MIME type used for the browser plugin.
25CONTENT_EXPORT extern const char kBrowserPluginMimeType[];
26
27CONTENT_EXPORT extern const char kFlashPluginName[];
28CONTENT_EXPORT extern const char kFlashPluginSwfMimeType[];
29CONTENT_EXPORT extern const char kFlashPluginSwfExtension[];
30CONTENT_EXPORT extern const char kFlashPluginSwfDescription[];
31CONTENT_EXPORT extern const char kFlashPluginSplMimeType[];
32CONTENT_EXPORT extern const char kFlashPluginSplExtension[];
33CONTENT_EXPORT extern const char kFlashPluginSplDescription[];
34
35CONTENT_EXPORT extern const size_t kMaxRendererProcessCount;
36
37// The maximum number of session history entries per tab.
38extern const int kMaxSessionHistoryEntries;
39
40// The maximum number of characters of the document's title that we're willing
41// to accept in the browser process.
42extern const size_t kMaxTitleChars;
43
44// The maximum number of characters in the URL that we're willing to accept
45// in the browser process. It is set low enough to avoid damage to the browser
46// but high enough that a web site can abuse location.hash for a little storage.
47// We have different values for "max accepted" and "max displayed" because
48// a data: URI may be legitimately massive, but the full URI would kill all
49// known operating systems if you dropped it into a UI control.
50CONTENT_EXPORT extern const size_t kMaxURLChars;
51CONTENT_EXPORT extern const size_t kMaxURLDisplayChars;
52
53extern const char kStatsFilename[];
54extern const int kStatsMaxThreads;
55extern const int kStatsMaxCounters;
56
57// Most sequence numbers are used by a renderer when responding to a browser
58// request for histogram data.  This reserved number is used when a renderer
59// sends an unprovoked update, such as after a page has been loaded.  Using
60// this reserved constant avoids any chance of confusion with a response having
61// a browser-supplied sequence number.
62CONTENT_EXPORT extern const int kHistogramSynchronizerReservedSequenceNumber;
63
64// Shared constants for the low latency flash audio field trial.
65CONTENT_EXPORT extern const char kLowLatencyFlashAudioFieldTrialName[];
66CONTENT_EXPORT extern const char kLowLatencyFlashAudioFieldTrialEnabledName[];
67
68}  // namespace content
69
70#endif  // CONTENT_PUBLIC_COMMON_CONTENT_CONSTANTS_H_
71