dom-ui options: record user metrics for pref changes....

chrome/browser/dom_ui/core_options_handler.h

Index: chrome/browser/dom_ui/core_options_handler.h
===================================================================
--- chrome/browser/dom_ui/core_options_handler.h	(revision 56963)
+++ chrome/browser/dom_ui/core_options_handler.h	(working copy)
@@ -41,8 +41,14 @@
   // Sets a pref value |value_string| of |pref_type| to given |pref_name|.
   virtual void SetPref(const std::string& pref_name,
                        Value::ValueType pref_type,
-                       const std::string& value_string);
+                       const std::string& value_string,
+                       const std::string& metric);
 
+  // Records a user metric action for the given value.
+  void ProcessUserMetric(Value::ValueType pref_type,
+                         const std::string& value_string,
+                         const std::string& metric);
+
   typedef std::multimap<std::string, std::wstring> PreferenceCallbackMap;
   PreferenceCallbackMap pref_callback_map_;
  private:
@@ -71,6 +77,10 @@
 
   void HandleSetPref(const ListValue* args, Value::ValueType type);
 
+  // Callback for the "coreOptionsUserMetricsAction" message.  This records
+  // an action that should be tracked if metrics recording is enabled.
+  void HandleUserMetricsAction(const ListValue* args);
+
   void NotifyPrefChanged(const std::string* pref_name);
 
   DISALLOW_COPY_AND_ASSIGN(CoreOptionsHandler);