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

content/renderer/pepper/ppb_broker_impl.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 "content/renderer/pepper/ppb_broker_impl.h"
 
 #include "base/logging.h"
 #include "content/common/view_messages.h"
 #include "content/renderer/pepper/common.h"
 #include "content/renderer/pepper/host_globals.h"
@@ skipping 106 matching lines @@
 
   // Synchronous calls are not supported.
   DCHECK(TrackedCallback::IsPending(connect_callback_));
 
   connect_callback_->Run(result);
 }
 
 bool PPB_Broker_Impl::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PPB_Broker_Impl, message)
-  IPC_MESSAGE_HANDLER(ViewMsg_PpapiBrokerChannelCreated,
-                      OnPpapiBrokerChannelCreated)
-  IPC_MESSAGE_HANDLER(ViewMsg_PpapiBrokerPermissionResult,
-                      OnPpapiBrokerPermissionResult)
-  IPC_MESSAGE_UNHANDLED(handled = false)
+    IPC_MESSAGE_HANDLER(ViewMsg_PpapiBrokerChannelCreated,
+                        OnPpapiBrokerChannelCreated)
+    IPC_MESSAGE_HANDLER(ViewMsg_PpapiBrokerPermissionResult,
+                        OnPpapiBrokerPermissionResult)
+    IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void PPB_Broker_Impl::OnPpapiBrokerChannelCreated(
     base::ProcessId broker_pid,
     const IPC::ChannelHandle& handle) {
   broker_->OnBrokerChannelConnected(broker_pid, handle);
 }
 
 void PPB_Broker_Impl::OnPpapiBrokerPermissionResult(bool result) {
   broker_->OnBrokerPermissionResult(this, result);
 }
 
 }  // namespace content