Add MessageLoop::QuitNow and use it to terminate a sync IPC....

ipc/ipc_sync_channel.cc

 // Copyright (c) 2006-2008 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 "ipc/ipc_sync_channel.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/thread_local.h"
 #include "base/message_loop.h"
@@ skipping 332 matching lines @@
 }
 
 void SyncChannel::SyncContext::OnWaitableEventSignaled(WaitableEvent* event) {
   if (event == shutdown_event_) {
     // Process shut down before we can get a reply to a synchronous message.
     // Cancel pending Send calls, which will end up setting the send done event.
     CancelPendingSends();
   } else {
     // We got the reply, timed out or the process shutdown.
     DCHECK(event == GetSendDoneEvent());
-    MessageLoop::current()->Quit();
+    MessageLoop::current()->QuitNow();
   }
 }
 
 
 SyncChannel::SyncChannel(
     const std::string& channel_id, Channel::Mode mode,
     Channel::Listener* listener, MessageFilter* filter,
     MessageLoop* ipc_message_loop, bool create_pipe_now,
     WaitableEvent* shutdown_event)
     : ChannelProxy(
@@ skipping 120 matching lines @@
 void SyncChannel::OnWaitableEventSignaled(WaitableEvent* event) {
   DCHECK(event == sync_context()->GetDispatchEvent());
   // The call to DispatchMessages might delete this object, so reregister
   // the object watcher first.
   event->Reset();
   dispatch_watcher_.StartWatching(event, this);
   sync_context()->DispatchMessages();
 }
 
 }  // namespace IPC