Delete Tracked, and move Location to its own file.

chrome/browser/sync/unrecoverable_error_handler.h

 // Copyright (c) 2010 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 CHROME_BROWSER_SYNC_UNRECOVERABLE_ERROR_HANDLER_H_
 #define CHROME_BROWSER_SYNC_UNRECOVERABLE_ERROR_HANDLER_H_
 #pragma once
 
 #include <string>
 
-#include "base/tracked.h"
+#include "base/location.h"
 
 namespace browser_sync {
 
 class UnrecoverableErrorHandler {
  public:
   // Call this when normal operation detects that the chrome model and the
   // syncer model are inconsistent, or similar.  The ProfileSyncService will
   // try to avoid doing any work to avoid crashing or corrupting things
   // further, and will report an error status if queried.
   virtual void OnUnrecoverableError(const tracked_objects::Location& from_here,
                                     const std::string& message) = 0;
  protected:
   virtual ~UnrecoverableErrorHandler() { }
 };
 
 }
 
 #endif  // CHROME_BROWSER_SYNC_UNRECOVERABLE_ERROR_HANDLER_H_