Delete Tracked, and move Location to its own file.

chrome/browser/sync/weak_handle.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 "chrome/browser/sync/weak_handle.h"
 
 #include <sstream>
 
+#include "base/location.h"
 #include "base/message_loop_proxy.h"
-#include "base/tracked.h"
 
 namespace browser_sync {
 
 namespace internal {
 
 WeakHandleCoreBase::WeakHandleCoreBase()
     : owner_loop_(MessageLoop::current()),
       owner_loop_proxy_(base::MessageLoopProxy::current()),
       destroyed_on_owner_thread_(false) {
   owner_loop_->AddDestructionObserver(this);
@@ skipping 75 matching lines @@
   delete this;
 }
 
 void WeakHandleCoreBaseTraits::Destruct(const WeakHandleCoreBase* core_base) {
   const_cast<WeakHandleCoreBase*>(core_base)->Destroy();
 }
 
 }  // namespace internal
 
 }  // namespace base