DevTools: use recordEnumeratedHistogram instead of recordActionTaken

Source/devtools/front_end/host/UserMetrics.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 65 matching lines @@
     TogglePrettyPrint: "togglePrettyPrint",
     SetBreakpoint: "setBreakpoint",
     OpenSourceLink: "openSourceLink",
     NetworkSort: "networkSort",
     NetworkRequestSelected: "networkRequestSelected",
     NetworkRequestTabSelected: "networkRequestTabSelected",
     HeapSnapshotFilterChanged: "heapSnapshotFilterChanged"
 };
 
 WebInspector.UserMetrics.prototype = {
+    /**
+     * @param {string} panelName
+     */
     panelShown: function(panelName)
     {
-        InspectorFrontendHost.recordPanelShown(WebInspector.UserMetrics._PanelCodes[panelName] || 0);
+        var code = WebInspector.UserMetrics._PanelCodes[panelName] || 0;
+        var size = Object.keys(WebInspector.UserMetrics._PanelCodes).length + 1;
+        InspectorFrontendHost.recordUMA("DevTools.PanelShown", code, size);
     },
 
     /**
      * @param {!WebInspector.UserMetrics.Actions} action
      */
     actionTaken: function(action)
     {
-        InspectorFrontendHost.recordActionTaken(action);
+        var size = Object.keys(WebInspector.UserMetrics.Actions).length + 1;
+        InspectorFrontendHost.recordUMA("DevTools.ActionTaken", action, size);
     }
 }
 WebInspector.userMetrics = new WebInspector.UserMetrics();