Add a unified resource tracker shared between the proxy and the impl.

ppapi/proxy/ppb_graphics_2d_proxy.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.
 
 #ifndef PPAPI_PPB_GRAPHICS_2D_PROXY_H_
 #define PPAPI_PPB_GRAPHICS_2D_PROXY_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_size.h"
 #include "ppapi/c/pp_var.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/proxy/interface_proxy.h"
-#include "ppapi/proxy/plugin_resource.h"
 #include "ppapi/proxy/proxy_non_thread_safe_ref_count.h"
 #include "ppapi/shared_impl/host_resource.h"
 
 struct PPB_Graphics2D;
 struct PP_Point;
 struct PP_Rect;
 
 namespace pp {
 namespace proxy {
 
@@ skipping 39 matching lines @@
                             const ppapi::HostResource& graphics_2d);
 
   CompletionCallbackFactory<PPB_Graphics2D_Proxy,
                             ProxyNonThreadSafeRefCount> callback_factory_;
 };
 
 }  // namespace proxy
 }  // namespace pp
 
 #endif  // PPAPI_PPB_GRAPHICS_2D_PROXY_H_