[cros] disable GDrive option on certain file pickers

chrome/browser/resources/file_manager/js/file_manager.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.
 
 /**
  * FileManager constructor.
  *
  * FileManager objects encapsulate the functionality of the file selector
  * dialogs, as well as the full screen file manager application (though the
  * latter is not yet implemented).
@@ skipping 2396 matching lines @@
     return this.gdataPreferences_.cellularDisabled &&
            this.networkState_.online &&
            this.networkState_.type == 'cellular';
   };
 
   FileManager.prototype.isOffline = function() {
     return !this.networkState_.online;
   };
 
   FileManager.prototype.isGDataEnabled = function() {
-    return !('driveEnabled' in this.gdataPreferences_) ||
-           this.gdataPreferences_.driveEnabled;
+    return this.params_.supportGData &&

[Dmitry Zvorygin, 2012/09/14 15:55:27]

Consider using opposite value - disableGData, because one can easily open file
manager just typing 'chrome://files' in url bar - and he will have GData
disabled by default, which is quite curious, isn't it?

[Evan Stade, 2012/09/14 16:25:12]

Done.

+        (!('driveEnabled' in this.gdataPreferences_) ||
+         this.gdataPreferences_.driveEnabled);
   };
 
   FileManager.prototype.isOnReadonlyDirectory = function() {
     return this.directoryModel_.isReadOnly();
   };
 
   FileManager.prototype.onExternallyUnmounted_ = function(event) {
     if (event.mountPath == this.directoryModel_.getCurrentRootPath()) {
       if (this.closeOnUnmount_) {
         // If the file manager opened automatically when a usb drive inserted,
@@ skipping 1242 matching lines @@
         this.dialogDom_.querySelector('#default-action-separator');
 
     // TODO(dzvorygin): Here we use this hack, since 'hidden' is standard
     // attribute and we can't use it's setter as usual.
     this.openWithCommand_.__lookupSetter__('hidden').
         call(this.openWithCommand_, !(defaultItem && isMultiple));
     this.defaultActionMenuItem_.hidden = !defaultItem;
     defaultActionSeparator.hidden = !defaultItem;
   };
 })();