Drive: Show the total size of cache files at chrome://drive-internals.

chrome/browser/resources/chromeos/drive_internals.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.
 
 /**
  * Updates the Authentication Status section.
  * @param {Object} authStatus Dictionary containing auth status.
  */
 function updateAuthStatus(authStatus) {
   $('has-refresh-token').textContent = authStatus['has-refresh-token'];
   $('has-access-token').textContent = authStatus['has-access-token'];
 }
 
 /**
  * Updates the GCache Contents section.
  * @param {Array} gcacheContents List of dictionaries describing metadata
  * of files and directories under the GCache directory.
+ * @param {Object} gcacheSummary Dictionary of summary of GCache.
  */
-function updateGCacheContents(gcacheContents) {
+function updateGCacheContents(gcacheContents, gcacheSummary) {
   var tbody = $('gcache-contents');
   for (var i = 0; i < gcacheContents.length; i++) {
     var entry = gcacheContents[i];
     var tr = document.createElement('tr');
 
     // Add some suffix based on the type.
     var path = entry.path;
     if (entry.is_directory)
       path += '/';
     else if (entry.is_symbolic_link)
       path += '@';
 
     tr.appendChild(createElementFromText('td', path));
     tr.appendChild(createElementFromText('td', entry.size));
     tr.appendChild(createElementFromText('td', entry.last_modified));
     tbody.appendChild(tr);
   }
+
+  $('gcache-summary-total-size').textContent = gcacheSummary['total_size'];
 }
 
 /**
  * Updates the File System Contents section. The function is called from the
  * C++ side repeatedly with contents of a directory.
  * @param {string} directoryContentsAsText Pre-formatted string representation
  * of contents a directory in the file system.
  */
 function updateFileSystemContents(directoryContentsAsText) {
   var div = $('file-system-contents');
@@ skipping 26 matching lines @@
  */
 function createElementFromText(elementName, text) {
   var element = document.createElement(elementName);
   element.appendChild(document.createTextNode(text));
   return element;
 }
 
 document.addEventListener('DOMContentLoaded', function() {
   chrome.send('pageLoaded');
 });