Add acknowledgement messages for PluginMsg_UpdateGeometry

chrome/plugin/webplugin_delegate_stub.cc

 // Copyright (c) 2009 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 "chrome/plugin/webplugin_delegate_stub.h"
 
 #include "build/build_config.h"
 
 #include "base/command_line.h"
 #include "chrome/common/child_process_logging.h"
@@ skipping 276 matching lines @@
 #else
   // TODO(port): plugin printing.
   NOTIMPLEMENTED();
 #endif
 }
 
 void WebPluginDelegateStub::OnUpdateGeometry(
     const PluginMsg_UpdateGeometry_Param& param) {
   webplugin_->UpdateGeometry(
       param.window_rect, param.clip_rect,
-      param.windowless_buffer, param.background_buffer);
+      param.windowless_buffer, param.background_buffer
+#if defined(OS_MACOSX)
+      ,
+      param.ack_key
+#endif
+      );
 }
 
 void WebPluginDelegateStub::OnGetPluginScriptableObject(int* route_id,
                                                         intptr_t* npobject_ptr) {
   NPObject* object = delegate_->GetPluginScriptableObject();
   if (!object) {
     *route_id = MSG_ROUTING_NONE;
     return;
   }
 
@@ skipping 77 matching lines @@
 
 void WebPluginDelegateStub::OnHandleURLRequestReply(
     const PluginMsg_URLRequestReply_Params& params) {
   WebPluginResourceClient* resource_client =
       delegate_->CreateResourceClient(params.resource_id, params.url,
                                       params.notify_needed,
                                       params.notify_data,
                                       params.stream);
   webplugin_->OnResourceCreated(params.resource_id, resource_client);
 }