Fixed wrong constant names to make Importer working again.

chrome/browser/resources/file_manager/js/photo/photo_import.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.
 
 document.addEventListener('DOMContentLoaded', function() {
   PhotoImport.load();
 });
 
 /**
  * The main Photo App object.
@@ skipping 19 matching lines @@
 
 PhotoImport.prototype = { __proto__: cr.EventTarget.prototype };
 
 /**
  * Single item width.
  * Keep in sync with .grid-item rule in photo_import.css.
  */
 PhotoImport.ITEM_WIDTH = 164 + 8;
 
 /**
- * Directory name on the GData containing the imported photos.
+ * Directory name on the Drive containing the imported photos.
  * TODO(dgozman): localize
  */
-PhotoImport.GDATA_PHOTOS_DIR = 'My Photos';
+PhotoImport.DRIVE_PHOTOS_DIR = 'My Photos';
 
 /**
  * Loads app in the document body.
  * @param {FileSystem=} opt_filesystem Local file system.
  * @param {Object} opt_params Parameters.
  */
 PhotoImport.load = function(opt_filesystem, opt_params) {
   ImageUtil.metrics = metrics;
 
   var hash = location.hash ? location.hash.substr(1) : '';
@@ skipping 68 matching lines @@
   var onError = this.onError_.bind(
       this, loadTimeData.getString('PHOTO_IMPORT_DRIVE_ERROR'));
 
   var onDirectory = function(dir) {
     this.destination_ = dir;
     // This may enable the import button, so check that.
     this.onSelectionChanged_();
   }.bind(this);
 
   var onMounted = function() {
-    var dir = PathUtil.join(RootDirectory.GDATA, PhotoImport.GDATA_PHOTOS_DIR);
+    var dir = PathUtil.join(RootDirectory.DRIVE, PhotoImport.DRIVE_PHOTOS_DIR);
     util.getOrCreateDirectory(this.filesystem_.root, dir, onDirectory, onError);
   }.bind(this);
 
-  if (this.volumeManager_.isMounted(RootDirectory.GDATA)) {
+  if (this.volumeManager_.isMounted(RootDirectory.DRIVE)) {
     onMounted();
   } else {
-    this.volumeManager_.mountGData(onMounted, onError);
+    this.volumeManager_.mountDrive(onMounted, onError);
   }
 };
 
 /**
  * Load the source contents.
  * @param {string} source Path to source.
  * @private
  */
 PhotoImport.prototype.loadSource_ = function(source) {
   var onTraversed = function(results) {
@@ skipping 332 matching lines @@
 
 /** @override */
 GridSelectionController.prototype.getLastIndex = function() {
   var dm = this.grid_.dataModel;
   for (var index = dm.length - 1; index >= 0; index--) {
     if (dm.item(index).type == 'entry')
       return index;
   }
   return -1;
 };