Make IPC::Channel::Listener:OnMessageReceived have a return value indicating ...

chrome/browser/ppapi_plugin_process_host.cc

 // Copyright (c) 2010 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/browser/ppapi_plugin_process_host.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/process_util.h"
 #include "chrome/browser/renderer_host/render_message_filter.h"
@@ skipping 51 matching lines @@
       cmd_line);
 }
 
 bool PpapiPluginProcessHost::CanShutdown() {
   return true;
 }
 
 void PpapiPluginProcessHost::OnProcessLaunched() {
 }
 
-void PpapiPluginProcessHost::OnMessageReceived(const IPC::Message& msg) {
+bool PpapiPluginProcessHost::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PpapiPluginProcessHost, msg)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PluginLoaded, OnPluginLoaded)
-    IPC_MESSAGE_UNHANDLED_ERROR();
+    IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
+  DCHECK(handled);
+  return handled;
 }
 
 void PpapiPluginProcessHost::OnChannelConnected(int32 peer_pid) {
 #if defined(OS_WIN)
   base::ProcessHandle plugins_renderer_handle = NULL;
   ::DuplicateHandle(::GetCurrentProcess(), filter_->peer_handle(),
                     GetChildProcessHandle(), &plugins_renderer_handle,
                     0, FALSE, DUPLICATE_SAME_ACCESS);
 #elif defined(OS_POSIX)
   base::ProcessHandle plugins_renderer_handle = filter_->peer_handle();
@@ skipping 28 matching lines @@
 
 void PpapiPluginProcessHost::ReplyToRenderer(
     base::ProcessHandle plugin_handle,
     const IPC::ChannelHandle& channel_handle) {
   DCHECK(reply_msg_.get());
   ViewHostMsg_OpenChannelToPepperPlugin::WriteReplyParams(reply_msg_.get(),
                                                           plugin_handle,
                                                           channel_handle);
   filter_->Send(reply_msg_.release());
 }