Discard duplicate includes of files from storage

storage/browser/quota/quota_manager_proxy.cc

 // Copyright 2014 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 "storage/browser/quota/quota_manager_proxy.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
-#include "base/callback.h"
 #include "base/sequenced_task_runner.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/task_runner_util.h"
 
 namespace storage {
 
 namespace {
 
 void DidGetUsageAndQuota(
@@ skipping 132 matching lines @@
 QuotaManagerProxy::QuotaManagerProxy(
     QuotaManager* manager,
     const scoped_refptr<base::SingleThreadTaskRunner>& io_thread)
     : manager_(manager), io_thread_(io_thread) {
 }
 
 QuotaManagerProxy::~QuotaManagerProxy() {
 }
 
 }  // namespace storage