Added/changed some strings for the Files app

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

 // Copyright (c) 2012 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.
 
 function MockEventSource() {
   this.listeners_ = [];
 }
 
 /**
  * Add a listener.
@@ skipping 438 matching lines @@
       DOWNLOADS_DIRECTORY_LABEL: 'Downloads',
       DOWNLOADS_DIRECTORY_WARNING: "<strong>Caution:</strong> These files are temporary and may be automatically deleted to free up disk space.  <a href='javascript://'>Learn More</a>",
       NAME_COLUMN_LABEL: 'Name',
       SIZE_COLUMN_LABEL: 'Size',
       SIZE_KB: 'KB',
       SIZE_MB: 'MB',
       SIZE_GB: 'GB',
       SIZE_TB: 'TB',
       SIZE_PB: 'PB',
       TYPE_COLUMN_LABEL: 'Type',
-      DATE_COLUMN_LABEL: 'Date',
+      DATE_COLUMN_LABEL: 'Date modified',
       PREVIEW_COLUMN_LABEL: 'Preview',
 
       ERROR_CREATING_FOLDER: 'Unable to create folder "$1". $2',
       ERROR_INVALID_CHARACTER: 'Invalid character: $1',
       ERROR_RESERVED_NAME: 'This name may not be used as a file of folder name',
       ERROR_WHITESPACE_NAME: 'Invalid name',
       ERROR_NEW_FOLDER_EMPTY_NAME: 'Please specify a folder name',
       NEW_FOLDER_BUTTON_LABEL: 'New folder',
       FILENAME_LABEL: 'File Name',
       PREPARING_LABEL: 'Preparing',
@@ skipping 63 matching lines @@
 
       UNMOUNT_FAILED: 'Unable to eject: $1',
       UNMOUNT_DEVICE_BUTTON_LABEL: 'Unmount',
       FORMAT_DEVICE_BUTTON_LABEL: 'Format',
 
       GDATA_MENU_HELP: 'Help',
       GDATA_MOBILE_CONNECTION_OPTION: 'Do not use mobile data for sync',
       GDATA_SHOW_HOSTED_FILES_OPTION: 'Show Google Docs files',
       GDATA_WAITING_FOR_SPACE_INFO: 'Waiting for space info...',
       GDATA_FAILED_SPACE_INFO: 'Failed to retrieve space info',
-      GDATA_BUY_MORE_SPACE: 'Buy more...',
+      GDATA_BUY_MORE_SPACE: 'Buy more storage...',
       GDATA_SPACE_AVAILABLE: '$1 left',
 
       OFFLINE_COLUMN_LABEL: 'Available offline',
       GDATA_LOADING: 'Hang with us. We\'re fetching your files.',
       GDATA_RETRY: 'Retry',
       GDATA_LEARN_MORE: 'Learn more',
       GDATA_CANNOT_REACH: '$1 cannot be reached at this time',
 
       GDATA_WELCOME_TITLE: 'Welcome to Google Drive!',
       GDATA_WELCOME_TITLE_ALTERNATIVE: 'Get 100 GB free with Google Drive',
@@ skipping 262 matching lines @@
     compare: function(a, b) {
       if (a > b) return 1;
       if (a < b) return -1;
       return 0;
     }
   };
 };
 
 return v8Intl;
 }());