base::Bind: Remove includes of base.bind in header files.

chrome/browser/sync/util/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/util/weak_handle.h"
 
 #include <sstream>
 
+#include "base/callback.h"
 #include "base/location.h"
 #include "base/message_loop_proxy.h"
 
 namespace browser_sync {
 
 namespace internal {
 
 WeakHandleCoreBase::WeakHandleCoreBase()
     : owner_loop_proxy_(base::MessageLoopProxy::current()) {}
 
 bool WeakHandleCoreBase::IsOnOwnerThread() const {
   return owner_loop_proxy_->BelongsToCurrentThread();
 }
 
 WeakHandleCoreBase::~WeakHandleCoreBase() {}
 
 void WeakHandleCoreBase::PostToOwnerThread(
     const tracked_objects::Location& from_here,
     const base::Closure& fn) const {
   if (!owner_loop_proxy_->PostTask(from_here, fn)) {
     DVLOG(1) << "Could not post task from " << from_here.ToString();
   }
 }
 
 }  // namespace internal
 
 }  // namespace base