Remove duplicate mountPaths in object literals

chrome/test/data/extensions/api_test/filebrowser_mount/test.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.
 
 // These have to be sync'd with file_browser_private_apitest.cc
 var expectedVolume1 = {
   devicePath: 'device_path1',
   mountPath: 'removable/mount_path1',
   systemPath: 'system_path1',
   filePath: 'file_path1',
   deviceLabel: 'device_label1',
   driveLabel: 'drive_label1',
   deviceType: 'usb',
   totalSize:  1073741824,
   isParent: false,
   isReadOnly: false,
   hasMedia: false,
   isOnBootDevice: false
 };
 
 var expectedVolume2 = {
   devicePath: 'device_path2',
-  mountPath: 'mount_path2',
   mountPath: 'removable/mount_path2',
   systemPath: 'system_path2',
   filePath: 'file_path2',
   deviceLabel: 'device_label2',
   driveLabel: 'drive_label2',
   deviceType: 'mobile',
   totalSize:  47723,
   isParent: true,
   isReadOnly: true,
   hasMedia: true,
   isOnBootDevice: true
 };
 
 var expectedVolume3 = {
   devicePath: 'device_path3',
-  mountPath: 'mount_path3',
   mountPath: 'removable/mount_path3',
   systemPath: 'system_path3',
   filePath: 'file_path3',
   deviceLabel: 'device_label3',
   driveLabel: 'drive_label3',
   deviceType: 'optical',
   totalSize:  0,
   isParent: true,
   isReadOnly: false,
   hasMedia: false,
@@ skipping 150 matching lines @@
               'getMountPoints returned wrong number of mount points.');
           for (var i = 0; i < expectedMountPoints.length; i++) {
             chrome.test.assertTrue(
                 validateObject(result[i], expectedMountPoints[i], 'mountPoint',
                                treatMountPointException),
                 'getMountPoints result[' + i +'] not as expected');
           }
     }));
   }
 ]);