Add UMA for the app list doodle being clicked.

chrome/browser/resources/app_list/start_page.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview App launcher start page implementation.
  */
 
 <include src="speech_manager.js">
 
@@ skipping 28 matching lines @@
    */
   function setNaclArch(arch) {
     speechManager.setNaclArch(arch);
   }
 
   /**
    * Invoked when the app-list bubble is shown.
    *
    * @param {boolean} hotwordEnabled Whether the hotword is enabled or not.
    */
-  function onAppListShown(hotwordEnabled) {
-    speechManager.onShown(hotwordEnabled);
+  function onAppListShown(hotwordEnabled, legacySpeechEnabled) {
+    if (legacySpeechEnabled)
+      speechManager.onShown(hotwordEnabled);
+
+    chrome.send('appListShown', [this.doodle != null]);
   }
 
   /**
    * Sets the doodle's visibility, hiding or showing the default logo.
    *
    * @param {boolean} visible Whether the doodle should be made visible.
    */
   function setDoodleVisible(visible) {
     var doodle = $('doodle');
     var defaultLogo = $('default_logo');
@@ skipping 44 matching lines @@
       setDoodleVisible(true);
     };
     doodleImage.src = doodleData.transparent_large_image.url;
 
     if (doodleData.target_url) {
       var doodleLink = document.createElement('a');
       doodleLink.id = 'doodle_link';
       doodleLink.href = doodleData.target_url;
       doodleLink.target = '_blank';
       doodleLink.appendChild(doodleImage);
+      doodleLink.onclick = function() {
+        chrome.send('doodleClicked');
+        return true;
+      };
       this.doodle.appendChild(doodleLink);
     } else {
       this.doodle.appendChild(doodleImage);
     }
     $('logo_container').appendChild(this.doodle);
   }
 
   /**
    * Invoked when the app-list bubble is hidden.
    */
@@ skipping 15 matching lines @@
     setNaclArch: setNaclArch,
     onAppListDoodleUpdated: onAppListDoodleUpdated,
     onAppListShown: onAppListShown,
     onAppListHidden: onAppListHidden,
     toggleSpeechRecognition: toggleSpeechRecognition
   };
 });
 
 document.addEventListener('contextmenu', function(e) { e.preventDefault(); });
 document.addEventListener('DOMContentLoaded', appList.startPage.initialize);