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

webkit/browser/fileapi/sandbox_file_stream_writer.cc

 // Copyright (c) 2012 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/sandbox_file_stream_writer.h"
 
 #include "base/files/file_util_proxy.h"
 #include "base/platform_file.h"
 #include "base/sequenced_task_runner.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "webkit/browser/blob/file_stream_reader.h"
 #include "webkit/browser/fileapi/file_observers.h"
 #include "webkit/browser/fileapi/file_stream_writer.h"
 #include "webkit/browser/fileapi/file_system_context.h"
 #include "webkit/browser/fileapi/file_system_operation_runner.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 {
 
 namespace {
 
 // Adjust the |quota| value in overwriting case (i.e. |file_size| > 0 and
 // |file_offset| < |file_size|) to make the remaining quota calculation easier.
 // Specifically this widens the quota for overlapping range (so that we can
 // simply compare written bytes against the adjusted quota).
@@ skipping 208 matching lines @@
   DCHECK(cancel_callback_.is_null());
 
   // Write() is not called yet, so there's nothing to flush.
   if (!local_file_writer_)
     return net::OK;
 
   return local_file_writer_->Flush(callback);
 }
 
 }  // namespace fileapi