Add a skeleton Start Page to the experimental app list.

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/command_line.h"
 #include "base/memory/singleton.h"
@@ skipping 127 matching lines @@
   observers_.RemoveObserver(observer);
 }
 
 void StartPageService::ToggleSpeechRecognition() {
   speech_button_toggled_manually_ = true;
   contents_->GetWebUI()->CallJavascriptFunction(
       "appList.startPage.toggleSpeechRecognition");
 }
 
 content::WebContents* StartPageService::GetStartPageContents() {
-  return CommandLine::ForCurrentProcess()->HasSwitch(
-      ::switches::kShowAppListStartPage) ? contents_.get() : NULL;
+  return (app_list::switches::IsExperimentalAppListEnabled() ||
+          app_list::switches::IsExperimentalAppListEnabled())

[xiyuan, 2014/03/14 17:00:54]

A || A is strange. We should just keep one.

[calamity, 2014/05/07 06:11:52]

Done.

+             ? contents_.get()
+             : NULL;
 }
 
 content::WebContents* StartPageService::GetSpeechRecognitionContents() {
+  return app_list::switches::IsVoiceSearchEnabled() ? contents_.get() : NULL;
+}
+
+content::WebContents* StartPageService::GetSpeechRecognitionContents() {

[xiyuan, 2014/03/14 17:00:54]

Unintended copy-n-paste?

[calamity, 2014/05/07 06:11:52]

Done.

   return app_list::switches::IsVoiceSearchEnabled() ? contents_.get() : NULL;
 }
 
 void StartPageService::OnSpeechResult(
     const base::string16& query, bool is_final) {
   if (is_final) {
     speech_result_obtained_ = true;
     RecordAction(UserMetricsAction("AppList_SearchedBySpeech"));
   }
   FOR_EACH_OBSERVER(StartPageObserver,
@@ skipping 34 matching lines @@
   FOR_EACH_OBSERVER(StartPageObserver,
                     observers_,
                     OnSpeechRecognitionStateChanged(new_state));
 }
 
 void StartPageService::Shutdown() {
   contents_.reset();
 }
 
 }  // namespace app_list