Remove IOThread::message_loop().

content/browser/browser_thread_impl.cc

 // Copyright (c) 2011 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 "content/browser/browser_thread_impl.h"
 
 #include "base/atomicops.h"
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/message_loop.h"
@@ skipping 383 matching lines @@
   return proxy;
 }
 
 base::Thread* BrowserThread::UnsafeGetBrowserThread(ID identifier) {
   base::AutoLock lock(g_lock.Get());
   base::Thread* thread = g_browser_threads[identifier];
   DCHECK(thread);
   return thread;
 }
 
+MessageLoop* BrowserThread::UnsafeGetMessageLoop(ID identifier) {
+  return UnsafeGetBrowserThread(identifier)->message_loop();
+}
+
 void BrowserThread::SetDelegate(ID identifier,
                                 BrowserThreadDelegate* delegate) {
   using base::subtle::AtomicWord;
   AtomicWord* storage = reinterpret_cast<AtomicWord*>(
       &g_browser_thread_delegates[identifier]);
   AtomicWord old_pointer = base::subtle::NoBarrier_AtomicExchange(
       storage, reinterpret_cast<AtomicWord>(delegate));
 
   // This catches registration when previously registered.
   DCHECK(!delegate || !old_pointer);
 }
 
 }  // namespace content