File manager: use pre-bound "self" variable instead of "this".

chrome/browser/resources/file_manager/js/file_copy_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.
 
 /**
  * @constructor
  * @param {DirectoryEntry} root Root directory entry.
  */
 function FileCopyManager(root) {
   this.copyTasks_ = [];
@@ skipping 662 matching lines @@
     self.sendOperationEvent_('copied', [entry]);
     onCopyCompleteBase(entry, size);
   }
 
   function onCopyProgress(entry, size) {
     task.updateFileCopyProgress(entry, size);
     self.sendProgressEvent_('PROGRESS');
   }
 
   function onError(reason, data) {
-    this.log_('serviceNextTaskEntry error: ' + reason + ':', data);
+    self.log_('serviceNextTaskEntry error: ' + reason + ':', data);
     errorCallback(new FileCopyManager.Error(reason, data));
   }
 
   function onFilesystemCopyComplete(sourceEntry, targetEntry) {
     // TODO(benchan): We currently do not know the size of data being
     // copied by FileEntry.copyTo(), so task.completedBytes will not be
     // increased. We will address this issue once we need to use
     // task.completedBytes to track the progress.
     self.sendOperationEvent_('copied', [sourceEntry, targetEntry]);
     onCopyCompleteBase(targetEntry, 0);
@@ skipping 242 matching lines @@
 
       writer.write(file);
     }
 
     targetEntry.createWriter(onWriterCreated, errorCallback);
   }
 
   sourceEntry.file(onSourceFileFound, errorCallback);
 };