[Pepper][FileAPI] Interface clean up (3/6)

webkit/browser/fileapi/quota/open_file_handle.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/open_file_handle.h"
 
 #include "webkit/browser/fileapi/quota/open_file_handle_context.h"
 #include "webkit/browser/fileapi/quota/quota_reservation.h"
 
 namespace fileapi {
 
 OpenFileHandle::~OpenFileHandle() {
   DCHECK(sequence_checker_.CalledOnValidSequencedThread());
 }
 
-int64 OpenFileHandle::UpdateMaxWrittenOffset(int64 offset) {
+void OpenFileHandle::UpdateMaxWrittenOffset(int64 offset) {
   DCHECK(sequence_checker_.CalledOnValidSequencedThread());
 
-  int64 new_file_size = 0;
-  int64 growth = 0;
-  context_->UpdateMaxWrittenOffset(offset, &new_file_size, &growth);
-
+  int64 growth = context_->UpdateMaxWrittenOffset(offset);
   if (growth > 0)
     reservation_->ConsumeReservation(growth);
-
-  return new_file_size;
 }
 
-int64 OpenFileHandle::base_file_size() const {
-  return context_->base_file_size();
+int64 OpenFileHandle::GetEstimatedFileSize() const {
+  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
+  return context_->GetEstimatedFileSize();
 }
 
 OpenFileHandle::OpenFileHandle(QuotaReservation* reservation,
                                OpenFileHandleContext* context)
     : reservation_(reservation),
       context_(context) {
   DCHECK(sequence_checker_.CalledOnValidSequencedThread());
 }
 
 }  // namespace fileapi