Create PluginMetricsProvider class.

chrome/browser/metrics/metrics_log.h

Index: chrome/browser/metrics/metrics_log.h
===================================================================
--- chrome/browser/metrics/metrics_log.h	(revision 272171)
+++ chrome/browser/metrics/metrics_log.h	(working copy)
@@ -15,14 +15,12 @@
 #include "chrome/browser/metrics/extension_metrics.h"
 #include "chrome/browser/metrics/metrics_network_observer.h"
 #include "chrome/common/variations/variations_util.h"
-#include "chrome/installer/util/google_update_settings.h"
 #include "components/metrics/metrics_log_base.h"
 #include "ui/gfx/size.h"
 
 class HashedExtensionMetrics;
 class MetricsNetworkObserver;
 class PrefService;
-class PrefRegistrySimple;
 
 #if defined(OS_CHROMEOS)
 class MetricsLogChromeOS;
@@ -56,8 +54,6 @@
   MetricsLog(const std::string& client_id, int session_id, LogType log_type);
   virtual ~MetricsLog();
 
-  static void RegisterPrefs(PrefRegistrySimple* registry);
-
   // Get the current version of the application as a string.
   static std::string GetVersionString();
 
@@ -75,7 +71,6 @@
   // is determined by the pref value.
   void RecordEnvironment(
       const std::vector<metrics::MetricsProvider*>& metrics_providers,
-      const std::vector<content::WebPluginInfo>& plugin_list,
       const std::vector<variations::ActiveGroupId>& synthetic_trials);
 
   // Loads the environment proto that was saved by the last RecordEnvironment()
@@ -147,9 +142,6 @@
   // call to RecordStabilityMetrics().
   bool HasStabilityMetrics() const;
 
-  // Within stability group, write plugin crash stats.
-  void WritePluginStabilityElements(PrefService* pref);
-
   // Within the stability group, write required attributes.
   void WriteRequiredStabilityAttributes(PrefService* pref);
 
@@ -161,9 +153,6 @@
                                         base::TimeDelta incremental_uptime,
                                         base::TimeDelta uptime);
 
-  // Writes the list of installed plugins.
-  void WritePluginList(const std::vector<content::WebPluginInfo>& plugin_list);
-
   // Observes network state to provide values for SystemProfile::Network.
   MetricsNetworkObserver network_observer_;