Convert the PluginResource to be refcounted.

ppapi/proxy/ppb_surface_3d_proxy.cc

 // 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/proxy/ppb_surface_3d_proxy.h"
 
 #include "gpu/command_buffer/client/gles2_implementation.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/dev/ppb_surface_3d_dev.h"
@@ skipping 118 matching lines @@
     }
   }
   attribs.push_back(PP_GRAPHICS3DATTRIB_NONE);  // Always terminate.
 
   HostResource result;
   dispatcher->Send(new PpapiHostMsg_PPBSurface3D_Create(
       INTERFACE_ID_PPB_SURFACE_3D, instance, config, attribs, &result));
 
   if (result.is_null())
     return 0;
-  linked_ptr<Surface3D> surface_3d(new Surface3D(result));
+  scoped_refptr<Surface3D> surface_3d(new Surface3D(result));
   PP_Resource resource =
       PluginResourceTracker::GetInstance()->AddResource(surface_3d);
   surface_3d->set_resource(resource);
   return resource;
 }
 
 bool PPB_Surface3D_Proxy::OnMessageReceived(const IPC::Message& msg) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PPB_Surface3D_Proxy, msg)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBSurface3D_Create,
@@ skipping 43 matching lines @@
 
 void PPB_Surface3D_Proxy::SendSwapBuffersACKToPlugin(
     int32_t result,
     const HostResource& surface_3d) {
   dispatcher()->Send(new PpapiMsg_PPBSurface3D_SwapBuffersACK(
       INTERFACE_ID_PPB_SURFACE_3D, surface_3d, result));
 }
 
 }  // namespace proxy
 }  // namespace pp