Add acknowledgement messages for PluginMsg_UpdateGeometry

chrome/common/plugin_messages_internal.h

 // 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 "app/gfx/native_widget_types.h"
 #include "base/shared_memory.h"
 #include "build/build_config.h"
 #include "ipc/ipc_message_macros.h"
 #include "webkit/glue/webcursor.h"
 
@@ skipping 354 matching lines @@
                       bool        /* notify_needed */,
                       intptr_t    /* notify_data */)
 
   IPC_MESSAGE_ROUTED2(PluginHostMsg_DeferResourceLoading,
                       int  /* resource_id */,
                       bool /* defer */)
 
   IPC_SYNC_MESSAGE_CONTROL1_0(PluginHostMsg_SetException,
                               std::string /* message */)
 
+#if defined(OS_MACOSX)
+  IPC_MESSAGE_ROUTED1(PluginHostMsg_UpdateGeometry_ACK,
+                      int /* ack_key */)
+#endif
+
 IPC_END_MESSAGES(PluginHost)
 
 //-----------------------------------------------------------------------------
 // NPObject messages
 // These are messages used to marshall NPObjects.  They are sent both from the
 // plugin to the renderer and from the renderer to the plugin.
 IPC_BEGIN_MESSAGES(NPObject)
   IPC_SYNC_MESSAGE_ROUTED0_0(NPObjectMsg_Release)
 
   IPC_SYNC_MESSAGE_ROUTED1_1(NPObjectMsg_HasMethod,
@@ skipping 36 matching lines @@
                              NPVariant_Param /* result_param */,
                              bool /* result */)
 
   IPC_SYNC_MESSAGE_ROUTED2_2(NPObjectMsg_Evaluate,
                              std::string /* script */,
                              bool /* popups_allowed */,
                              NPVariant_Param /* result_param */,
                              bool /* result */)
 
 IPC_END_MESSAGES(NPObject)