Reduce header dependencies in base/

base/tracked_objects.h

 // 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.
 
 #ifndef BASE_TRACKED_OBJECTS_H_
 #define BASE_TRACKED_OBJECTS_H_
 
 //------------------------------------------------------------------------------

[M-A Ruel, 2009/06/03 14:28:37]

Remove that useless waste of bytes.

 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/lock.h"
-#include "base/message_loop.h"
+#include "base/task.h"
 #include "base/thread_local_storage.h"
 #include "base/tracked.h"
 
+class MessageLoop;
 
 namespace tracked_objects {
 
 //------------------------------------------------------------------------------
 // For a specific thread, and a specific birth place, the collection of all
 // death info (with tallies for each death thread, to prevent access conflicts).
 class ThreadData;
 class BirthOnThread {
  public:
   explicit BirthOnThread(const Location& location);
@@ skipping 477 matching lines @@
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AutoTracking);
 };
 
 
 }  // namespace tracked_objects
 
 #endif  // BASE_TRACKED_OBJECTS_H_