Revert 233815 "Quota: Implement QuotaBackendImpl"

trunk/src/webkit/browser/fileapi/quota/quota_backend_impl.cc

Index: trunk/src/webkit/browser/fileapi/quota/quota_backend_impl.cc
===================================================================
--- trunk/src/webkit/browser/fileapi/quota/quota_backend_impl.cc	(revision 233827)
+++ trunk/src/webkit/browser/fileapi/quota/quota_backend_impl.cc	(working copy)
@@ -1,148 +0,0 @@
-// 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/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),
-      obfuscated_file_util_(obfuscated_file_util),
-      file_system_usage_cache_(file_system_usage_cache),
-      quota_manager_proxy_(quota_manager_proxy),
-      weak_ptr_factory_(this) {
-}
-
-QuotaBackendImpl::~QuotaBackendImpl() {
-}
-
-void QuotaBackendImpl::ReserveQuota(const GURL& origin,
-                                    FileSystemType type,
-                                    int64 delta,
-                                    const ReserveQuotaCallback& callback) {
-  DCHECK(file_task_runner_->RunsTasksOnCurrentThread());
-  if (!delta) {
-    callback.Run(base::PLATFORM_FILE_OK);
-    return;
-  }
-  DCHECK(quota_manager_proxy_);
-  quota_manager_proxy_->GetUsageAndQuota(
-      file_task_runner_, origin, FileSystemTypeToQuotaStorageType(type),
-      base::Bind(&QuotaBackendImpl::DidGetUsageAndQuotaForReserveQuota,
-                 weak_ptr_factory_.GetWeakPtr(),
-                 QuotaReservationInfo(origin, type, delta), callback));
-}
-
-void QuotaBackendImpl::ReleaseReservedQuota(const GURL& origin,
-                                            FileSystemType type,
-                                            int64 size) {
-  DCHECK(file_task_runner_->RunsTasksOnCurrentThread());
-  DCHECK_LE(0, size);
-  if (!size)
-    return;
-  ReserveQuotaInternal(QuotaReservationInfo(origin, type, -size));
-}
-
-void QuotaBackendImpl::CommitQuotaUsage(const GURL& origin,
-                                        FileSystemType type,
-                                        int64 delta) {
-  DCHECK(file_task_runner_->RunsTasksOnCurrentThread());
-  if (!delta)
-    return;
-  ReserveQuotaInternal(QuotaReservationInfo(origin, type, delta));
-  base::FilePath path;
-  if (GetUsageCachePath(origin, type, &path) != base::PLATFORM_FILE_OK)
-    return;
-  bool result = file_system_usage_cache_->AtomicUpdateUsageByDelta(path, delta);
-  DCHECK(result);
-}
-
-void QuotaBackendImpl::IncrementDirtyCount(const GURL& origin,
-                                           FileSystemType type) {
-  DCHECK(file_task_runner_->RunsTasksOnCurrentThread());
-  base::FilePath path;
-  if (GetUsageCachePath(origin, type, &path) != base::PLATFORM_FILE_OK)
-    return;
-  DCHECK(file_system_usage_cache_);
-  file_system_usage_cache_->IncrementDirty(path);
-}
-
-void QuotaBackendImpl::DecrementDirtyCount(const GURL& origin,
-                                           FileSystemType type) {
-  DCHECK(file_task_runner_->RunsTasksOnCurrentThread());
-  base::FilePath path;
-  if (GetUsageCachePath(origin, type, &path) != base::PLATFORM_FILE_OK)
-    return;
-  DCHECK(file_system_usage_cache_);
-  file_system_usage_cache_->DecrementDirty(path);
-}
-
-void QuotaBackendImpl::DidGetUsageAndQuotaForReserveQuota(
-    const QuotaReservationInfo& info,
-    const ReserveQuotaCallback& callback,
-    quota::QuotaStatusCode status, int64 usage, int64 quota) {
-  DCHECK(file_task_runner_->RunsTasksOnCurrentThread());
-  if (status != quota::kQuotaStatusOk) {
-    callback.Run(base::PLATFORM_FILE_ERROR_FAILED);
-    return;
-  }
-
-  if (quota < usage + info.delta) {
-    callback.Run(base::PLATFORM_FILE_ERROR_NO_SPACE);
-    return;
-  }
-
-  ReserveQuotaInternal(info);
-  if (callback.Run(base::PLATFORM_FILE_OK))
-    return;
-  // The requester could not accept the reserved quota. Revert it.
-  ReserveQuotaInternal(
-      QuotaReservationInfo(info.origin, info.type, -info.delta));
-}
-
-void QuotaBackendImpl::ReserveQuotaInternal(const QuotaReservationInfo& info) {
-  DCHECK(file_task_runner_->RunsTasksOnCurrentThread());
-  DCHECK(quota_manager_proxy_);
-  quota_manager_proxy_->NotifyStorageModified(
-      quota::QuotaClient::kFileSystem, info.origin,
-      FileSystemTypeToQuotaStorageType(info.type), info.delta);
-}
-
-base::PlatformFileError QuotaBackendImpl::GetUsageCachePath(
-    const GURL& origin,
-    FileSystemType type,
-    base::FilePath* usage_file_path) {
-  DCHECK(file_task_runner_->RunsTasksOnCurrentThread());
-  DCHECK(usage_file_path);
-  base::PlatformFileError error = base::PLATFORM_FILE_OK;
-  *usage_file_path =
-      SandboxFileSystemBackendDelegate::GetUsageCachePathForOriginAndType(
-          obfuscated_file_util_, origin, type, &error);
-  return error;
-}
-
-QuotaBackendImpl::QuotaReservationInfo::QuotaReservationInfo(
-    const GURL& origin, FileSystemType type, int64 delta)
-    : origin(origin), type(type), delta(delta) {
-}
-
-QuotaBackendImpl::QuotaReservationInfo::~QuotaReservationInfo() {
-}
-
-}  // namespace fileapi