chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.h

   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.
   4
   5 #ifndef CHROME_BROWSER_METRICS_CHROME_BROWSER_MAIN_EXTRA_PARTS_METRICS_H_
   6 #define CHROME_BROWSER_METRICS_CHROME_BROWSER_MAIN_EXTRA_PARTS_METRICS_H_
   7
   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 "chrome/browser/metrics/first_web_contents_profiler.h"
  13 #include "ui/gfx/display_observer.h"
  14
  15 class ChromeBrowserMainParts;
  16
  17 namespace chrome {
  18 void AddMetricsExtraParts(ChromeBrowserMainParts* main_parts);
  19 }
  20
  21 class ChromeBrowserMainExtraPartsMetrics
  22     : public ChromeBrowserMainExtraParts,
  23       public gfx::DisplayObserver,
  24       public FirstWebContentsProfiler::Delegate {
  25  public:
  26   ChromeBrowserMainExtraPartsMetrics();
  27   ~ChromeBrowserMainExtraPartsMetrics() override;
  28
  29   // Overridden from ChromeBrowserMainExtraParts:
  30   void PreProfileInit() override;
  31   void PreBrowserStart() override;
  32   void PostBrowserStart() override;
  33
  34  private:
  35 #if defined(OS_MACOSX) && !defined(OS_IOS)
  36   // Records Mac specific metrics.
  37   void RecordMacMetrics();
  38 #endif  // defined(OS_MACOSX) && !defined(OS_IOS)
  39
  40   // DisplayObserver overrides.
  41   virtual void OnDisplayAdded(const gfx::Display& new_display) override;
  42   virtual void OnDisplayRemoved(const gfx::Display& old_display) override;
  43   virtual void OnDisplayMetricsChanged(const gfx::Display& display,
  44                                        uint32_t changed_metrics) override;
  45
  46   // FirstWebContentsProfilerDelegate overrides.
  47   void ProfilerFinishedCollectingMetrics() override;
  48
  49   // If the number of displays has changed, emit a UMA metric.
  50   void EmitDisplaysChangedMetric();
  51
  52   // A cached value for the number of displays.
  53   int display_count_;
  54
  55   // True iff |this| instance is registered as an observer of the native
  56   // screen.
  57   bool is_screen_observer_;
  58
  59   // Measures start up performance of the first active web contents.
  60   scoped_ptr<FirstWebContentsProfiler> first_web_contents_profiler_;
  61
  62   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainExtraPartsMetrics);
  63 };
  64
  65 #endif  // CHROME_BROWSER_METRICS_CHROME_BROWSER_MAIN_EXTRA_PARTS_METRICS_H_