Add UMA for the app list doodle being clicked.

chrome/browser/ui/app_list/start_page_service.cc

 // 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.
 
 #include "chrome/browser/ui/app_list/start_page_service.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 334 matching lines @@
 void StartPageService::LoadContentsIfNeeded() {
   if (!contents_)
     LoadContents();
 }
 
 void StartPageService::AppListShown() {
   if (!contents_) {
     LoadContents();
   } else if (contents_->IsCrashed()) {
     LoadStartPageURL();
-  } else if (contents_->GetWebUI() &&
-             !HotwordService::IsExperimentalHotwordingEnabled()) {
-    // If experimental hotwording is enabled, don't call onAppListShown.
-    // onAppListShown() initializes the web speech API, which is not used with
+  } else if (contents_->GetWebUI()) {
+    // If experimental hotwording is enabled, don't initialize the web speech
+    // API, which is not used with
     // experimental hotwording.
     contents_->GetWebUI()->CallJavascriptFunction(
         "appList.startPage.onAppListShown",
-        base::FundamentalValue(HotwordEnabled()));
+        base::FundamentalValue(HotwordEnabled()),
+        base::FundamentalValue(
+            !HotwordService::IsExperimentalHotwordingEnabled()));
   }
 
 #if defined(OS_CHROMEOS)
   audio_status_.reset(new AudioStatus(this));
 #endif
 }
 
 void StartPageService::AppListHidden() {
   if (contents_->GetWebUI()) {
     contents_->GetWebUI()->CallJavascriptFunction(
@@ skipping 290 matching lines @@
 
   // Check for a new doodle.
   content::BrowserThread::PostDelayedTask(
       content::BrowserThread::UI, FROM_HERE,
       base::Bind(&StartPageService::FetchDoodleJson,
                  weak_factory_.GetWeakPtr()),
       recheck_delay);
 }
 
 }  // namespace app_list