1 // Copyright (c) 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.
5 #ifndef CHROME_BROWSER_METRICS_CHROME_BROWSER_MAIN_EXTRA_PARTS_METRICS_H_
6 #define CHROME_BROWSER_METRICS_CHROME_BROWSER_MAIN_EXTRA_PARTS_METRICS_H_
8 #include "base/basictypes.h"
9 #include "base/compiler_specific.h"
10 #include "base/memory/scoped_ptr.h"
11 #include "chrome/browser/chrome_browser_main_extra_parts.h"
12 #include "ui/gfx/display_observer.h"
14 class ChromeBrowserMainParts;
17 void AddMetricsExtraParts(ChromeBrowserMainParts* main_parts);
20 class ChromeBrowserMainExtraPartsMetrics : public ChromeBrowserMainExtraParts,
21 public gfx::DisplayObserver {
23 ChromeBrowserMainExtraPartsMetrics();
24 ~ChromeBrowserMainExtraPartsMetrics() override;
26 // Overridden from ChromeBrowserMainExtraParts:
27 void PreProfileInit() override;
28 void PreBrowserStart() override;
29 void PostBrowserStart() override;
32 #if defined(OS_MACOSX) && !defined(OS_IOS)
33 // Records Mac specific metrics.
34 void RecordMacMetrics();
35 #endif // defined(OS_MACOSX) && !defined(OS_IOS)
37 // DisplayObserver overrides.
38 virtual void OnDisplayAdded(const gfx::Display& new_display) override;
39 virtual void OnDisplayRemoved(const gfx::Display& old_display) override;
40 virtual void OnDisplayMetricsChanged(const gfx::Display& display,
41 uint32_t changed_metrics) override;
43 // If the number of displays has changed, emit a UMA metric.
44 void EmitDisplaysChangedMetric();
46 // A cached value for the number of displays.
49 // True iff |this| instance is registered as an observer of the native
51 bool is_screen_observer_;
53 DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainExtraPartsMetrics);
56 #endif // CHROME_BROWSER_METRICS_CHROME_BROWSER_MAIN_EXTRA_PARTS_METRICS_H_