Make the NaCl windows 64 bit binaries not depend on chrome targets.

content/common/file_system/file_system_dispatcher_dummy.cc

Index: content/common/file_system/file_system_dispatcher_dummy.cc
===================================================================
--- content/common/file_system/file_system_dispatcher_dummy.cc	(revision 100721)
+++ content/common/file_system/file_system_dispatcher_dummy.cc	(working copy)
@@ -1,21 +0,0 @@
-// Copyright (c) 2011 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 "content/common/file_system/file_system_dispatcher.h"
-
-#include "base/compiler_specific.h"
-
-// FileSystemDispatcher --------------------------------------------------------
-
-FileSystemDispatcher::FileSystemDispatcher() {
-}
-
-FileSystemDispatcher::~FileSystemDispatcher() {
-}
-
-// FileSystemDispatcher implementation -----------------------------------------
-
-bool FileSystemDispatcher::OnMessageReceived(const IPC::Message& message) {
-  return false;
-}