Move base/thread.h to base/threading, fix up callers to use the new location....

base/threading/thread_collision_warner.h

-// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// 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.
 
-#ifndef BASE_THREAD_COLLISION_WARNER_H_
-#define BASE_THREAD_COLLISION_WARNER_H_
+#ifndef BASE_THREADING_THREAD_COLLISION_WARNER_H_
+#define BASE_THREADING_THREAD_COLLISION_WARNER_H_
 #pragma once
 
 #include <memory>
 
 #include "base/atomicops.h"
 
 // A helper class alongside macros to be used to verify assumptions about thread
 // safety of a class.
 //
 // Example: Queue implementation non thread-safe but still usable if clients
@@ skipping 216 matching lines @@
 
   // Here only for class unit tests purpose, during the test I need to not
   // DCHECK but notify the collision with something else.
   AsserterBase* asserter_;
 
   DISALLOW_COPY_AND_ASSIGN(ThreadCollisionWarner);
 };
 
 }  // namespace base
 
-#endif  // BASE_THREAD_COLLISION_WARNER_H_
+#endif  // BASE_THREADING_THREAD_COLLISION_WARNER_H_