Remove the last occurence of fullPath from file_operation_manager.js.

chrome/browser/resources/file_manager/background/js/file_operation_manager.js

 // Copyright 2013 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.
 
 'use strict';
 
 /**
  * Utilities for FileOperationManager.
  */
 var fileOperationUtil = {};
@@ skipping 1154 matching lines @@
 
 /**
  * Checks if the move operation is available between the given two locations.
  *
  * @param {DirectoryEntry} sourceEntry An entry from the source.
  * @param {DirectoryEntry} targetDirEntry Directory entry for the target.
  * @return {boolean} Whether we can move from the source to the target.
  */
 FileOperationManager.prototype.isMovable = function(
     sourceEntry, targetDirEntry) {
-  // TODO(mtomasz): Use the volume manager instead of full paths.
-  return (PathUtil.isDriveBasedPath(sourceEntry.fullPath) &&
-          PathUtil.isDriveBasedPath(targetDirEntry.fullPath)) ||
-         (PathUtil.getRootPath(sourceEntry.fullPath) ==
-          PathUtil.getRootPath(targetDirEntry.fullPath));
+  var sourceLocationInfo = this.volumeManager_.getLocationInfo(sourceEntry);
+  var targetDirLocationInfo = this.volumeManager_.getLocationInfo(
+      targetDirEntry);
+
+  return sourceLocationInfo && targetDirLocationInfo &&
+      sourceLocationInfo.volumeInfo === targetDirLocationInfo.volumeInfo;
 };
 
 /**
  * Initiate a file copy.
  *
  * @param {DirectoryEntry} targetDirEntry Target directory.
  * @param {Array.<Entry>} entries Entries to copy.
  * @param {boolean} isMove In case of move.
  * @return {FileOperationManager.Task} Copy task.
  * @private
@@ skipping 216 matching lines @@
 
 /**
  * Generates new task ID.
  *
  * @return {string} New task ID.
  * @private
  */
 FileOperationManager.prototype.generateTaskId_ = function() {
   return 'file-operation-' + this.taskIdCounter_++;
 };