Revert of Reduce plugin_metrics_provider_ usage in MetricsService

chrome/browser/metrics/plugin_metrics_provider.h

Index: chrome/browser/metrics/plugin_metrics_provider.h
diff --git a/chrome/browser/metrics/plugin_metrics_provider.h b/chrome/browser/metrics/plugin_metrics_provider.h
index baabcf746df0bc5a1f499815ca0898d56e7078d0..14ba2222da6d121859ec0871c6d9c39e68c72d06 100644
--- a/chrome/browser/metrics/plugin_metrics_provider.h
+++ b/chrome/browser/metrics/plugin_metrics_provider.h
@@ -42,7 +42,10 @@
       metrics::SystemProfileProto* system_profile_proto) OVERRIDE;
   virtual void ProvideStabilityMetrics(
       metrics::SystemProfileProto* system_profile_proto) OVERRIDE;
-  virtual void RecordCurrentState() OVERRIDE;
+
+  // Saves plugin-related updates from the in-object buffer to Local State
+  // for retrieval next time we send a Profile log (generally next launch).
+  void RecordPluginChanges();
 
   // Notifies the provider about an error loading the plugin at |plugin_path|.
   void LogPluginLoadingError(const base::FilePath& plugin_path);