Storage manager: Show Google Drive offline files.

chrome/browser/resources/options/chromeos/storage_manager.js

 // Copyright 2016 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.
 
 /**
  * @typedef {{
  *   totalSize: string,
  *   availableSize: string,
  *   usedSize: string,
  *   usedRatio: number
@@ skipping 16 matching lines @@
   StorageManager.prototype = {
     __proto__: Page.prototype,
 
     /** @override */
     initializePage: function() {
       Page.prototype.initializePage.call(this);
 
       $('storage-manager-label-downloads').onclick = function() {
         chrome.send('openDownloads');
       };
+      $('storage-manager-label-drive-cache').onclick = function() {
+        PageManager.showPageByName('storageClearDriveCache');
+      };
       $('storage-manager-label-arc').onclick = function() {
         chrome.send('openArcStorage');
       };
 
       $('storage-confirm').onclick = function() {
         PageManager.closeOverlay();
       };
     },
 
     /** @override */
@@ skipping 18 matching lines @@
     /**
      * Updates the size Downloads directory.
      * @param {string} size Formatted string of the size of Downloads.
      * @private
      */
     setDownloadsSize_: function(size) {
       $('storage-manager-size-downloads').textContent = size;
     },
 
     /**
+     * Updates the size of Google Drive offline files.
+     * @param {string} size Formatted string of the size of Google Drive offline
+     *     files.
+     * @private
+     */
+    setDriveCacheSize_: function(size) {
+      $('storage-manager-size-drive-cache').textContent = size;
+    },
+
+    /**
      * Updates the total size of Android apps and cache.
      * @param {string} size Formatted string of the size of Android apps and
      * cache.
      * @private
      */
     setArcSize_: function(size) {
       assert(!$('storage-manager-item-arc').hidden);
       $('storage-manager-size-arc').textContent = size;
     },
 
     /**
      * Shows the item "Android apps and cache" on the overlay UI.
      * @private
      */
     showArcItem_: function() {
       $('storage-manager-item-arc').hidden = false;
     },
   };
 
   // Forward public APIs to private implementations.
   cr.makePublic(StorageManager, [
     'setArcSize',
     'setDownloadsSize',
+    'setDriveCacheSize',
     'setSizeStat',
     'showArcItem',
   ]);
 
   return {
     StorageManager: StorageManager
   };
 });