1// Copyright 2013 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#ifndef CONTENT_RENDERER_STATS_COLLECTION_CONTROLLER_H_
6#define CONTENT_RENDERER_STATS_COLLECTION_CONTROLLER_H_
7
8#include "base/basictypes.h"
9#include "gin/wrappable.h"
10
11namespace blink {
12class WebFrame;
13}
14
15namespace content {
16
17// This class is exposed in JS as window.statsCollectionController and provides
18// functionality to read out statistics from the browser.
19// Its use must be enabled specifically via the
20// --enable-stats-collection-bindings command line flag.
21class StatsCollectionController
22    : public gin::Wrappable<StatsCollectionController> {
23 public:
24  static gin::WrapperInfo kWrapperInfo;
25
26  static void Install(blink::WebFrame* frame);
27
28 private:
29  StatsCollectionController();
30  virtual ~StatsCollectionController();
31
32  // gin::WrappableBase
33  virtual gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
34      v8::Isolate* isolate) OVERRIDE;
35
36  // Retrieves a histogram and returns a JSON representation of it.
37  std::string GetHistogram(const std::string& histogram_name);
38
39  // Retrieves a histogram from the browser process and returns a JSON
40  // representation of it.
41  std::string GetBrowserHistogram(const std::string& histogram_name);
42
43  // Returns JSON representation of tab timing information for the current tab.
44  std::string GetTabLoadTiming();
45
46  DISALLOW_COPY_AND_ASSIGN(StatsCollectionController);
47};
48
49}  // namespace content
50
51#endif  // CONTENT_RENDERER_STATS_COLLECTION_CONTROLLER_H_
52