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

chrome/browser/sync/util/weak_handle.h

 // 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.
 
 // Weak handles provides a way to refer to weak pointers from another
 // thread.  This is useful because it is not safe to reference a weak
 // pointer from a thread other than the thread on which it was
 // created.
 //
 // Weak handles can be passed across threads, so for example, you can
@@ skipping 34 matching lines @@
 // };
 
 #ifndef CHROME_BROWSER_SYNC_UTIL_WEAK_HANDLE_H_
 #define CHROME_BROWSER_SYNC_UTIL_WEAK_HANDLE_H_
 #pragma once
 
 #include <cstddef>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
-#include "base/callback.h"
+#include "base/callback_forward.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 
 namespace base {
 class MessageLoopProxy;
 }  // namespace base
@@ skipping 304 matching lines @@
 
 // Makes a WeakHandle from a WeakPtr.
 template <typename T>
 WeakHandle<T> MakeWeakHandle(const base::WeakPtr<T>& ptr) {
   return WeakHandle<T>(ptr);
 }
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_UTIL_WEAK_HANDLE_H_