Hide experimental app list Google logo and custom launcher page when search engine is not Google.

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 116 matching lines @@
   }
 
   /**
    * Invoked when the user explicitly wants to toggle the speech recognition
    * state.
    */
   function toggleSpeechRecognition() {
     speechManager.toggleSpeechRecognition();
   }
 
+  function onSearchEngineChanged(is_google) {
+    $('logo_container').style.display = is_google ? 'block' : 'none';

[Matt Giuca, 2015/02/10 08:27:05]

Can't we just hide the whole WebContents in this case, rather than sending a
message down to the JS and having it behave differently?

[calamity, 2015/02/13 02:55:24]

That's a good point. Done.

+  }
+
   return {
     initialize: initialize,
     setHotwordEnabled: setHotwordEnabled,
     setNaclArch: setNaclArch,
     onAppListDoodleUpdated: onAppListDoodleUpdated,
+    onSearchEngineChanged: onSearchEngineChanged,
     onAppListShown: onAppListShown,
     onAppListHidden: onAppListHidden,
     toggleSpeechRecognition: toggleSpeechRecognition
   };
 });
 
 document.addEventListener('contextmenu', function(e) { e.preventDefault(); });
 document.addEventListener('DOMContentLoaded', appList.startPage.initialize);