Make IPC::Channel::Listener:OnMessageReceived have a return value indicating whether a message was processed or not.

TBR=brettw
Review URL: http://codereview.chromium.org/5978003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@70139 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: a95986a837fc86e079b5c6dac357636478b50092
diff --git a/ipc/ipc_sync_channel_unittest.cc b/ipc/ipc_sync_channel_unittest.cc
index 772df0b..e580ba4 100644
--- a/ipc/ipc_sync_channel_unittest.cc
+++ b/ipc/ipc_sync_channel_unittest.cc
@@ -195,7 +195,7 @@
     listener_event->Signal();
   }
 
-  void OnMessageReceived(const Message& message) {
+  bool OnMessageReceived(const Message& message) {
     IPC_BEGIN_MESSAGE_MAP(Worker, message)
      IPC_MESSAGE_HANDLER_DELAY_REPLY(SyncChannelTestMsg_Double, OnDoubleDelay)
      IPC_MESSAGE_HANDLER_DELAY_REPLY(SyncChannelTestMsg_AnswerToLife,
@@ -203,6 +203,7 @@
      IPC_MESSAGE_HANDLER_DELAY_REPLY(SyncChannelNestedTestMsg_String,
                                      OnNestedTestMsg)
     IPC_END_MESSAGE_MAP()
+    return true;
   }
 
   void StartThread(base::Thread* thread, MessageLoop::Type type) {