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

base/message_loop.cc

 // Copyright (c) 2009 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 "base/message_loop.h"
 
 #include <algorithm>
 
 #include "base/compiler_specific.h"
 #include "base/lazy_instance.h"
@@ skipping 215 matching lines @@
 
 void MessageLoop::Quit() {
   DCHECK(current() == this);
   if (state_) {
     state_->quit_received = true;
   } else {
     NOTREACHED() << "Must be inside Run to call Quit";
   }
 }
 
+void MessageLoop::QuitNow() {
+  DCHECK(current() == this);
+  if (state_) {
+    pump_->Quit();
+  } else {
+    NOTREACHED() << "Must be inside Run to call Quit";
+  }
+}
+
 void MessageLoop::PostTask(
     const tracked_objects::Location& from_here, Task* task) {
   PostTask_Helper(from_here, task, 0, true);
 }
 
 void MessageLoop::PostDelayedTask(
     const tracked_objects::Location& from_here, Task* task, int64 delay_ms) {
   PostTask_Helper(from_here, task, delay_ms, true);
 }
 
@@ skipping 380 matching lines @@
                                            Watcher *delegate) {
   return pump_libevent()->WatchFileDescriptor(
       fd,
       persistent,
       static_cast<base::MessagePumpLibevent::Mode>(mode),
       controller,
       delegate);
 }
 
 #endif