[filebrowser] Update dialogs layout (prompt, alert, etc.).

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 267 matching lines @@
       PASTE_UNEXPECTED_ERROR: 'Paste failed, unexpected error: $1',
 
       DEVICE_TYPE_FLASH: 'Flash Device',
       DEVICE_TYPE_HDD: 'Hard Disk Device',
       DEVICE_TYPE_OPTICAL: 'Optical Device',
       DEVICE_TYPE_UNDEFINED: 'Unknown Device',
 
       CANCEL_LABEL: 'Cancel',
       OPEN_LABEL: 'Open',
       SAVE_LABEL: 'Save',
-      OK_LABEL: 'Ok',
+      OK_LABEL: 'OK',
 
       DEFAULT_NEW_FOLDER_NAME: 'New Folder',
       MORE_FILES: 'Show all files',
 
       SELECT_FOLDER_TITLE: 'Select a folder to open',
       SELECT_OPEN_FILE_TITLE: 'Select a file to open',
       SELECT_OPEN_MULTI_FILE_TITLE: 'Select one or more files',
       SELECT_SAVEAS_FILE_TITLE: 'Save file as',
 
       COMPUTING_SELECTION: 'Computing selection...',
@@ skipping 82 matching lines @@
 };
 
 chrome.experimental = {
   metrics: {
     recordValue: function() {},
     recordMediumCount: function() {},
     recordTime: function() {},
     recordUserAction: function() {}
   }
 };