chrome/browser/metrics/plugin_metrics_provider.h

   1 // Copyright 2014 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_PLUGIN_METRICS_PROVIDER_H_
   6 #define CHROME_BROWSER_METRICS_PLUGIN_METRICS_PROVIDER_H_
   7
   8 #include <map>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/gtest_prod_util.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "base/strings/string16.h"
  15 #include "components/metrics/metrics_provider.h"
  16 #include "content/public/browser/browser_child_process_observer.h"
  17
  18 namespace base {
  19 class FilePath;
  20 }
  21
  22 namespace content {
  23 struct WebPluginInfo;
  24 }
  25
  26 class PrefRegistrySimple;
  27 class PrefService;
  28
  29 // PluginMetricsProvider is responsible for adding out plugin information to
  30 // the UMA proto.
  31 class PluginMetricsProvider : public metrics::MetricsProvider,
  32                               public content::BrowserChildProcessObserver {
  33  public:
  34   explicit PluginMetricsProvider(PrefService* local_state);
  35   ~PluginMetricsProvider() override;
  36
  37   // Fetches plugin information data asynchronously and calls |done_callback|
  38   // when done.
  39   void GetPluginInformation(const base::Closure& done_callback);
  40
  41   // metrics::MetricsDataProvider:
  42   void ProvideSystemProfileMetrics(
  43       metrics::SystemProfileProto* system_profile_proto) override;
  44   void ProvideStabilityMetrics(
  45       metrics::SystemProfileProto* system_profile_proto) override;
  46   void ClearSavedStabilityMetrics() override;
  47
  48   // Notifies the provider about an error loading the plugin at |plugin_path|.
  49   void LogPluginLoadingError(const base::FilePath& plugin_path);
  50
  51   // Sets this provider's list of plugins, exposed for testing.
  52   void SetPluginsForTesting(const std::vector<content::WebPluginInfo>& plugins);
  53
  54   // Returns true if process of type |type| should be counted as a plugin
  55   // process, and false otherwise.
  56   static bool IsPluginProcess(int process_type);
  57
  58   // Registers local state prefs used by this class.
  59   static void RegisterPrefs(PrefRegistrySimple* registry);
  60
  61  private:
  62   FRIEND_TEST_ALL_PREFIXES(PluginMetricsProviderTest,
  63                            RecordCurrentStateWithDelay);
  64   FRIEND_TEST_ALL_PREFIXES(PluginMetricsProviderTest,
  65                            RecordCurrentStateIfPending);
  66   FRIEND_TEST_ALL_PREFIXES(PluginMetricsProviderTest,
  67                            ProvideStabilityMetricsWhenPendingTask);
  68   struct ChildProcessStats;
  69
  70   // Receives the plugin list from the PluginService and calls |done_callback|.
  71   void OnGotPlugins(const base::Closure& done_callback,
  72                     const std::vector<content::WebPluginInfo>& plugins);
  73
  74   // Returns reference to ChildProcessStats corresponding to |data|.
  75   ChildProcessStats& GetChildProcessStats(
  76       const content::ChildProcessData& data);
  77
  78   // Saves plugin information to local state.
  79   void RecordCurrentState();
  80
  81   // Posts a delayed task for RecordCurrentState. Returns true if new task is
  82   // posted and false if there was one already waiting for execution.
  83   // The param delay_sec is for unit tests.
  84   bool RecordCurrentStateWithDelay(int delay_ms);
  85
  86   // If a delayed RecordCurrnetState task exists then cancels it, calls
  87   // RecordCurrentState immediately and returns true. Otherwise returns false.
  88   bool RecordCurrentStateIfPending();
  89
  90   // content::BrowserChildProcessObserver:
  91   void BrowserChildProcessHostConnected(
  92       const content::ChildProcessData& data) override;
  93   void BrowserChildProcessCrashed(const content::ChildProcessData& data,
  94                                   int exit_code) override;
  95   void BrowserChildProcessInstanceCreated(
  96       const content::ChildProcessData& data) override;
  97
  98   PrefService* local_state_;
  99
 100   // The list of plugins which was retrieved on the file thread.
 101   std::vector<content::WebPluginInfo> plugins_;
 102
 103   // Buffer of child process notifications for quick access.
 104   std::map<base::string16, ChildProcessStats> child_process_stats_buffer_;
 105
 106   base::WeakPtrFactory<PluginMetricsProvider> weak_ptr_factory_;
 107
 108   DISALLOW_COPY_AND_ASSIGN(PluginMetricsProvider);
 109 };
 110
 111 #endif  // CHROME_BROWSER_METRICS_PLUGIN_METRICS_PROVIDER_H_