Do not show available bytes in media views.

ui/file_manager/file_manager/foreground/js/gear_menu_controller.js

 // Copyright 2014 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.
 
 /**
  * @param {!cr.ui.MenuButton} gearButton
  * @param {!FilesToggleRipple} toggleRipple
  * @param {!GearMenu} gearMenu
  * @param {!DirectoryModel} directoryModel
  * @param {!CommandHandler} commandHandler
@@ skipping 73 matching lines @@
  * @private
  */
 GearMenuController.prototype.refreshRemainingSpace_ =
     function(showLoadingCaption) {
   var currentVolumeInfo = this.directoryModel_.getCurrentVolumeInfo();
   if (!currentVolumeInfo)
     return;
 
   // TODO(mtomasz): Add support for remaining space indication for provided
   // file systems.
-  if (currentVolumeInfo.volumeType == VolumeManagerCommon.VolumeType.PROVIDED) {
+  if (currentVolumeInfo.volumeType == VolumeManagerCommon.VolumeType.PROVIDED ||
+      currentVolumeInfo.volumeType ==
+          VolumeManagerCommon.VolumeType.MEDIA_VIEW) {
     this.gearMenu_.setSpaceInfo(null, false);
     return;
   }
 
   this.gearMenu_.setSpaceInfo(new Promise(function(fulfill) {
     chrome.fileManagerPrivate.getSizeStats(currentVolumeInfo.volumeId, fulfill);
   }), true);
 };
 
 /**
  * Handles preferences change and updates menu.
  * @private
  */
 GearMenuController.prototype.onPreferencesChanged_ = function() {
   chrome.fileManagerPrivate.getPreferences(function(prefs) {
     if (chrome.runtime.lastError)
       return;
 
     if (prefs.cellularDisabled)
       this.gearMenu_.syncButton.setAttribute('checked', '');
     else
       this.gearMenu_.syncButton.removeAttribute('checked');
 
     if (!prefs.hostedFilesDisabled)
       this.gearMenu_.hostedButton.setAttribute('checked', '');
     else
       this.gearMenu_.hostedButton.removeAttribute('checked');
   }.bind(this));
 };