Add ability to create pending resource hosts.

ppapi/proxy/plugin_resource.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.
 
 #ifndef PPAPI_PROXY_PLUGIN_RESOURCE_H_
 #define PPAPI_PROXY_PLUGIN_RESOURCE_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 44 matching lines @@
   };
 
   IPC::Sender* GetSender(Destination dest) {
     return dest == RENDERER ? connection_.renderer_sender :
                               connection_.browser_sender;
   }
 
   // Sends a create message to the browser or renderer for the current resource.
   void SendCreate(Destination dest, const IPC::Message& msg);
 
+  // When the host returnes a resource to the plugin, it will create a pending
+  // ResourceHost and send an ID back to the plugin that identifies the pending
+  // object. The plugin uses this function to connect the plugin resource with
+  // the pending host resource. See also PpapiHostMsg_AttachToPendingHost. This
+  // is in lieu of sending a create message.
+  void AttachToPendingHost(Destination dest, int pending_host_id);
+
   // Sends the given IPC message as a resource request to the host
   // corresponding to this resource object and does not expect a reply.
   void Post(Destination dest, const IPC::Message& msg);
 
   // Like Post() but expects a response. |callback| is a |base::Callback| that
   // will be run when a reply message with a sequence number matching that of
   // the call is received. |ReplyMsgClass| is the type of the reply message that
   // is expected. An example of usage:
   //
   // Call<PpapiPluginMsg_MyResourceType_MyReplyMessage>(
@@ skipping 150 matching lines @@
 
   if (UnpackMessage<ReplyMsgClass>(reply, a, b, c, d, e))
     return result;
   return PP_ERROR_FAILED;
 }
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PLUGIN_RESOURCE_H_