Relanding this with fixes to the mac dbg builder

webkit/plugins/ppapi/webkit_forwarding_impl.h

-// 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 "ppapi/shared_impl/webkit_forwarding.h"
-
-#include "base/compiler_specific.h"
-#include "webkit/plugins/webkit_plugins_export.h"
-
-namespace ppapi {
-struct Preferences;
-}
-
-namespace webkit {
-namespace ppapi {
-
-class WebKitForwardingImpl : public ::ppapi::WebKitForwarding {
- public:
-  WEBKIT_PLUGINS_EXPORT WebKitForwardingImpl();
-  WEBKIT_PLUGINS_EXPORT virtual ~WebKitForwardingImpl();
-
-  virtual void CreateFontForwarding(base::WaitableEvent* event,
-                                    const PP_FontDescription_Dev& desc,
-                                    const std::string& desc_face,
-                                    const ::ppapi::Preferences& prefs,
-                                    Font** result) OVERRIDE;
-};
-
-}  // namespace ppapi
-}  // namespace webkit