Migrate webkit/browser/ to storage/browser/

webkit/browser/fileapi/quota/open_file_handle_context.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_context.h"
-
-#include "base/file_util.h"
-#include "webkit/browser/fileapi/quota/quota_reservation_buffer.h"
-
-namespace storage {
-
-OpenFileHandleContext::OpenFileHandleContext(
-    const base::FilePath& platform_path,
-    QuotaReservationBuffer* reservation_buffer)
-    : initial_file_size_(0),
-      maximum_written_offset_(0),
-      append_mode_write_amount_(0),
-      platform_path_(platform_path),
-      reservation_buffer_(reservation_buffer) {
-  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
-
-  base::GetFileSize(platform_path, &initial_file_size_);
-  maximum_written_offset_ = initial_file_size_;
-}
-
-int64 OpenFileHandleContext::UpdateMaxWrittenOffset(int64 offset) {
-  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
-  if (offset <= maximum_written_offset_)
-    return 0;
-
-  int64 growth = offset - maximum_written_offset_;
-  maximum_written_offset_ = offset;
-  return growth;
-}
-
-void OpenFileHandleContext::AddAppendModeWriteAmount(int64 amount) {
-  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
-  append_mode_write_amount_ += amount;
-}
-
-int64 OpenFileHandleContext::GetEstimatedFileSize() const {
-  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
-  return maximum_written_offset_ + append_mode_write_amount_;
-}
-
-int64 OpenFileHandleContext::GetMaxWrittenOffset() const {
-  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
-  return maximum_written_offset_;
-}
-
-OpenFileHandleContext::~OpenFileHandleContext() {
-  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
-
-  // TODO(tzik): Optimize this for single operation.
-
-  int64 file_size = 0;
-  base::GetFileSize(platform_path_, &file_size);
-  int64 usage_delta = file_size - initial_file_size_;
-
-  // |reserved_quota_consumption| may be greater than the recorded file growth
-  // when a plugin crashed before reporting its consumption.
-  // In this case, the reserved quota for the plugin should be handled as
-  // consumed quota.
-  int64 reserved_quota_consumption =
-      std::max(GetEstimatedFileSize(), file_size) - initial_file_size_;
-
-  reservation_buffer_->CommitFileGrowth(
-      reserved_quota_consumption, usage_delta);
-  reservation_buffer_->DetachOpenFileHandleContext(this);
-}
-
-}  // namespace storage