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

webkit/glue/webkit_glue_dummy.cc

-// Copyright (c) 2006-2009 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/glue/webkit_glue.h"
-#include "webkit/glue/user_agent.h"
-
-
-//------------------------------------------------------------------------------
-// webkit_glue impl:
-
-namespace webkit_glue {
-
-// Global variable used by the plugin quirk "die after unload".
-bool g_forcefully_terminate_plugin_process = false;
-
-void SetUserAgent(const std::string& new_user_agent) {
-}
-
-std::string BuildUserAgentHelper(bool mimic_windows,
-                                 const std::string& product) {
-  return std::string();
-}
-
-} // namespace webkit_glue