Revert "Move a bunch of ChromeOS APIs out of chrome/browser/extensions."

chrome/browser/resources/file_manager/js/mock_chrome.js

 // Copyright (c) 2011 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.
 
 /**
  * Mock out the chrome.fileBrowserPrivate API for use in the harness.
  */
 chrome.fileBrowserPrivate = {
 
   /**
@@ skipping 189 matching lines @@
     }
   },
 
   getSizeStats: function() {},
 
   /**
    * Return localized strings.
    */
   getStrings: function(callback) {
     // Keep this list in sync with the strings in generated_resources.grd and
-    // file_browser_extension_api.cc!
+    // extension_file_browser_private_api.cc!
     callback({
       // These two are from locale_settings*.grd
       WEB_FONT_FAMILY: 'Chrome Droid Sans,Droid Sans Fallback,sans-serif',
       WEB_FONT_SIZE: '84%',
 
       FILE_IS_DIRECTORY: 'Folder',
       PARENT_DIRECTORY: 'Parent Directory',
 
       ROOT_DIRECTORY_LABEL: 'Files',
       DOWNLOADS_DIRECTORY_LABEL: 'File Shelf',
@@ skipping 175 matching lines @@
 };
 
 chrome.experimental = {
   metrics: {
     recordValue: function() {},
     recordMediumCount: function() {},
     recordTime: function() {},
     recordUserAction: function() {}
   }
 };