Move CancellationFlag and WaitableEvent to the synchronization subdirectory....

base/threading/thread.cc

 // Copyright (c) 2006-2009 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/threading/thread.h"
 
 #include "base/lazy_instance.h"
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
 #include "base/threading/thread_local.h"
-#include "base/waitable_event.h"
+#include "base/synchronization/waitable_event.h"
 
 namespace base {
 
 // This task is used to trigger the message loop to exit.
 class ThreadQuitTask : public Task {
  public:
   virtual void Run() {
     MessageLoop::current()->Quit();
     Thread::SetThreadWasQuitProperly(true);
   }
@@ skipping 150 matching lines @@
 
     // We can't receive messages anymore.
     message_loop_ = NULL;
     message_loop_proxy_ = NULL;
   }
   CleanUpAfterMessageLoopDestruction();
   thread_id_ = kInvalidThreadId;
 }
 
 }  // namespace base