Relanding this with fixes to the mac dbg builder

ppapi/proxy/ppapi_proxy_test.h

 // 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 <map>
 #include <string>
 
 #include "base/message_loop.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/waitable_event.h"
@@ skipping 103 matching lines @@
     // ProxyChannel::Delegate implementation.
     virtual base::MessageLoopProxy* GetIPCMessageLoop() OVERRIDE;
     virtual base::WaitableEvent* GetShutdownEvent() OVERRIDE;
 
     // PluginDispatcher::PluginDelegate implementation.
     virtual std::set<PP_Instance>* GetGloballySeenInstanceIDSet() OVERRIDE;
     virtual uint32 Register(PluginDispatcher* plugin_dispatcher) OVERRIDE;
     virtual void Unregister(uint32 plugin_dispatcher_id) OVERRIDE;
 
     // PluginPepperDelegate implementation.
-    virtual ppapi::WebKitForwarding* GetWebKitForwarding() OVERRIDE;
-    virtual void PostToWebKitThread(const tracked_objects::Location& from_here,
-                                    const base::Closure& task) OVERRIDE;
     virtual bool SendToBrowser(IPC::Message* msg) OVERRIDE;
     virtual void PreCacheFont(const void* logfontw) OVERRIDE;
 
    private:
     base::MessageLoopProxy* ipc_message_loop_;  // Weak
     base::WaitableEvent* shutdown_event_;  // Weak
     std::set<PP_Instance> instance_id_set_;
 
     DISALLOW_COPY_AND_ASSIGN(PluginDelegateMock);
   };
@@ skipping 118 matching lines @@
   // stopping the harnesses.
   ProxyTestHarnessBase* remote_harness_;
   ProxyTestHarnessBase* local_harness_;
 
   base::WaitableEvent channel_created_;
   base::WaitableEvent shutdown_event_;
 };
 
 }  // namespace proxy
 }  // namespace ppapi