Broker out PPAPI handle duplication

webkit/fileapi/file_system_callback_dispatcher.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 #include "webkit/fileapi/file_system_callback_dispatcher.h"
 
 #include "base/logging.h"
 
 namespace fileapi {
 
 FileSystemCallbackDispatcher::~FileSystemCallbackDispatcher() {
 }
 
 void FileSystemCallbackDispatcher::DidOpenFile(
-    base::PlatformFile file,
-    base::ProcessHandle peer_handle) {
+    base::PlatformFile file) {
   NOTREACHED();
 
   if (file != base::kInvalidPlatformFileValue)
     base::ClosePlatformFile(file);
 }
 
 }  // namespace fileapi