Eliminate MetricsProvider::RecordCurrentState()

chrome/browser/metrics/plugin_metrics_provider.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_METRICS_PLUGIN_METRICS_PROVIDER_H_
 #define CHROME_BROWSER_METRICS_PLUGIN_METRICS_PROVIDER_H_
 
 #include <map>
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/gtest_prod_util.h"
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
 #include "components/metrics/metrics_provider.h"
 #include "content/public/browser/browser_child_process_observer.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace content {
@@ skipping 13 matching lines @@
 
   // Fetches plugin information data asynchronously and calls |done_callback|
   // when done.
   void GetPluginInformation(const base::Closure& done_callback);
 
   // metrics::MetricsDataProvider:
   virtual void ProvideSystemProfileMetrics(
       metrics::SystemProfileProto* system_profile_proto) OVERRIDE;
   virtual void ProvideStabilityMetrics(
       metrics::SystemProfileProto* system_profile_proto) OVERRIDE;
-  virtual void RecordCurrentState() OVERRIDE;
 
   // Notifies the provider about an error loading the plugin at |plugin_path|.
   void LogPluginLoadingError(const base::FilePath& plugin_path);
 
   // Sets this provider's list of plugins, exposed for testing.
   void SetPluginsForTesting(const std::vector<content::WebPluginInfo>& plugins);
 
   // Returns true if process of type |type| should be counted as a plugin
   // process, and false otherwise.
   static bool IsPluginProcess(int process_type);
 
   // Registers local state prefs used by this class.
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(PluginMetricsProviderTest,
+                           RecordCurrentStateWithDelay);
+  FRIEND_TEST_ALL_PREFIXES(PluginMetricsProviderTest,
+                           RecordCurrentStateIfPending);
+  FRIEND_TEST_ALL_PREFIXES(PluginMetricsProviderTest,
+                           ProvideStabilityMetricsWhenPendingTask);
   struct ChildProcessStats;
 
   // Receives the plugin list from the PluginService and calls |done_callback|.
   void OnGotPlugins(const base::Closure& done_callback,
                     const std::vector<content::WebPluginInfo>& plugins);
 
   // Returns reference to ChildProcessStats corresponding to |data|.
   ChildProcessStats& GetChildProcessStats(
       const content::ChildProcessData& data);
 
+  // Saves plugin information to local state.
+  void RecordCurrentState();
+
+  // Posts a delayed task for RecordCurrentState. Returns true if new task is
+  // posted and false if there was one already waiting for execution.
+  // The param delay_sec is for unit tests.
+  bool RecordCurrentStateWithDelay(int delay_ms);
+
+  // If a delayed RecordCurrnetState task exists then cancels it, calls
+  // RecordCurrentState immediately and returns true. Otherwise returns false.
+  bool RecordCurrentStateIfPending();
+
   // content::BrowserChildProcessObserver:
   virtual void BrowserChildProcessHostConnected(
       const content::ChildProcessData& data) OVERRIDE;
   virtual void BrowserChildProcessCrashed(
       const content::ChildProcessData& data) OVERRIDE;
   virtual void BrowserChildProcessInstanceCreated(
       const content::ChildProcessData& data) OVERRIDE;
 
   PrefService* local_state_;
 
   // The list of plugins which was retrieved on the file thread.
   std::vector<content::WebPluginInfo> plugins_;
 
   // Buffer of child process notifications for quick access.
   std::map<base::string16, ChildProcessStats> child_process_stats_buffer_;
 
   base::WeakPtrFactory<PluginMetricsProvider> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginMetricsProvider);
 };
 
 #endif  // CHROME_BROWSER_METRICS_PLUGIN_METRICS_PROVIDER_H_