DevTools: use recordEnumeratedHistogram instead of recordActionTaken

Source/devtools/front_end/host/UserMetrics.js

Index: Source/devtools/front_end/host/UserMetrics.js
diff --git a/Source/devtools/front_end/host/UserMetrics.js b/Source/devtools/front_end/host/UserMetrics.js
index 62fa7c1152b45265945b973384e70f2319e0356a..ce1c44b422aa4d81741fe90738989283673d963c 100644
--- a/Source/devtools/front_end/host/UserMetrics.js
+++ b/Source/devtools/front_end/host/UserMetrics.js
@@ -83,9 +83,14 @@ WebInspector.UserMetrics.UserActionNames = {
 };
 
 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);
     },
 
     /**
@@ -93,7 +98,8 @@ WebInspector.UserMetrics.prototype = {
      */
     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();