Add support for passing an arbitrary parameter to an IPC message handler. The motivation is for Web…

chrome/renderer/pepper/pepper_flash_menu_host.cc

 // 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.
 
 #include "chrome/renderer/pepper/pepper_flash_menu_host.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/common/context_menu_params.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/public/renderer/renderer_ppapi_host.h"
@@ skipping 104 matching lines @@
     content::RenderFrame* render_frame =
         renderer_ppapi_host_->GetRenderFrameForInstance(pp_instance());
     if (render_frame)
       render_frame->CancelContextMenu(context_menu_request_id_);
   }
 }
 
 int32_t PepperFlashMenuHost::OnResourceMessageReceived(
     const IPC::Message& msg,
     ppapi::host::HostMessageContext* context) {
-  IPC_BEGIN_MESSAGE_MAP(PepperFlashMenuHost, msg)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_FlashMenu_Show, OnHostMsgShow)
-  IPC_END_MESSAGE_MAP()
+  PPAPI_BEGIN_MESSAGE_MAP(PepperFlashMenuHost, msg)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_FlashMenu_Show,
+                                      OnHostMsgShow)
+  PPAPI_END_MESSAGE_MAP()
   return PP_ERROR_FAILED;
 }
 
 int32_t PepperFlashMenuHost::OnHostMsgShow(
     ppapi::host::HostMessageContext* context,
     const PP_Point& location) {
   // Note that all early returns must do a SendMenuReply. The sync result for
   // this message isn't used, so to forward the error to the plugin, we need to
   // additionally call SendMenuReply explicitly.
   if (menu_data_.empty()) {
@@ skipping 54 matching lines @@
 }
 
 void PepperFlashMenuHost::SendMenuReply(int32_t result, int action) {
   ppapi::host::ReplyMessageContext reply_context(
       ppapi::proxy::ResourceMessageReplyParams(pp_resource(), 0),
       NULL,
       MSG_ROUTING_NONE);
   reply_context.params.set_result(result);
   host()->SendReply(reply_context, PpapiPluginMsg_FlashMenu_ShowReply(action));
 }