Add a base class for objects that want to filter messages on the UI thread. ...

ipc/ipc_sync_channel_unittest.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.
 //
 // Unit test for SyncChannel.
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 152 matching lines @@
   base::Thread* ListenerThread() {
     return overrided_thread_ ? overrided_thread_ : &listener_thread_;
   }
 
  private:
   // Called on the listener thread to create the sync channel.
   void OnStart() {
     // Link ipc_thread_, listener_thread_ and channel_ altogether.
     StartThread(&ipc_thread_, MessageLoop::TYPE_IO);
     channel_.reset(new SyncChannel(
-        channel_name_, mode_, this, NULL, ipc_thread_.message_loop(), true,
+        channel_name_, mode_, this, ipc_thread_.message_loop(), true,
         &shutdown_event_));
     channel_created_->Signal();
     Run();
   }
 
   void OnListenerThreadShutdown1(WaitableEvent* listener_event,
                                  WaitableEvent* ipc_event) {
     // SyncChannel needs to be destructed on the thread that it was created on.
     channel_.reset();
 
@@ skipping 978 matching lines @@
   server.done_event()->Wait();
   server.done_event()->Reset();
 
   server.SendDummy();
   server.done_event()->Wait();
 
   EXPECT_FALSE(server.send_result());
 }