Quota: Factor out (Mock)QuotaManagerProxy into its own file for readability

webkit/browser/fileapi/quota/quota_backend_impl.cc

 // Copyright 2013 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 "webkit/browser/fileapi/quota/quota_backend_impl.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/sequenced_task_runner.h"
 #include "webkit/browser/fileapi/file_system_usage_cache.h"
 #include "webkit/browser/quota/quota_client.h"
-#include "webkit/browser/quota/quota_manager.h"
+#include "webkit/browser/quota/quota_manager_proxy.h"
 #include "webkit/common/fileapi/file_system_util.h"
 
 namespace fileapi {
 
 QuotaBackendImpl::QuotaBackendImpl(
     base::SequencedTaskRunner* file_task_runner,
     ObfuscatedFileUtil* obfuscated_file_util,
     FileSystemUsageCache* file_system_usage_cache,
     quota::QuotaManagerProxy* quota_manager_proxy)
     : file_task_runner_(file_task_runner),
@@ skipping 121 matching lines @@
 
 QuotaBackendImpl::QuotaReservationInfo::QuotaReservationInfo(
     const GURL& origin, FileSystemType type, int64 delta)
     : origin(origin), type(type), delta(delta) {
 }
 
 QuotaBackendImpl::QuotaReservationInfo::~QuotaReservationInfo() {
 }
 
 }  // namespace fileapi