Move FileCopyManager to background page.

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 496 matching lines @@
     this.updateFileTypeFilter_();
 
     // Show the page now unless it's already delayed.
     this.delayShow_(0);
 
     metrics.recordInterval('Load.DOM');
     metrics.recordInterval('Load.Total');
   };
 
   FileManager.prototype.initDataTransferOperations_ = function() {
-    this.copyManager_ = new FileCopyManager(this.filesystem_.root);
+    this.copyManager_ = new FileCopyManagerWrapper.getInstance(
+        this.filesystem_.root);
     this.copyManager_.addEventListener('copy-progress',
                                        this.onCopyProgress_.bind(this));
     this.copyManager_.addEventListener('copy-operation-complete',
         this.onCopyManagerOperationComplete_.bind(this));
 
     var controller = this.fileTransferController_ = new FileTransferController(
         GridItem.bind(null, this, false /* no checkbox */),
         this.copyManager_,
         this.directoryModel_);
     controller.attachDragSource(this.table_.list);
@@ skipping 3650 matching lines @@
       this.defaultActionMenuItem_.taskId = taskItem.taskId;
     }
 
     var defaultActionSeparator =
         this.dialogDom_.querySelector('#default-action-separator');
 
     this.defaultActionMenuItem_.hidden = !taskItem;
     defaultActionSeparator.hidden = !taskItem;
   }
 })();
+