Extract Drive related code to drive::MountPointProviderDelegate.

chrome/browser/chromeos/drive/mount_point_provider_delegate.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 "chrome/browser/chromeos/drive/mount_point_provider_delegate.h"
+
+#include "chrome/browser/chromeos/fileapi/remote_file_stream_writer.h"
+#include "chrome/browser/chromeos/fileapi/remote_file_system_operation.h"
+#include "content/public/browser/browser_thread.h"
+#include "webkit/browser/blob/file_stream_reader.h"
+#include "webkit/browser/fileapi/external_mount_points.h"
+#include "webkit/browser/fileapi/file_system_task_runners.h"
+#include "webkit/browser/fileapi/remote_file_system_proxy.h"
+
+using content::BrowserThread;
+
+namespace drive {
+
+MountPointProviderDelegate::MountPointProviderDelegate(
+    fileapi::ExternalMountPoints* mount_points)
+    : mount_points_(mount_points) {
+}
+
+MountPointProviderDelegate::~MountPointProviderDelegate() {
+}
+
+fileapi::AsyncFileUtil* MountPointProviderDelegate::GetAsyncFileUtil(
+    fileapi::FileSystemType type) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_EQ(fileapi::kFileSystemTypeDrive, type);
+
+  // TODO(hidehiko): Support this method.
+  NOTIMPLEMENTED();
+  return NULL;
+}
+
+scoped_ptr<webkit_blob::FileStreamReader>
+MountPointProviderDelegate::CreateFileStreamReader(
+    const fileapi::FileSystemURL& url,
+    int64 offset,
+    const base::Time& expected_modification_time,
+    fileapi::FileSystemContext* context) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_EQ(fileapi::kFileSystemTypeDrive, url.type());
+
+  fileapi::RemoteFileSystemProxyInterface* proxy =
+      mount_points_->GetRemoteFileSystemProxy(url.filesystem_id());
+  if (!proxy)
+    return scoped_ptr<webkit_blob::FileStreamReader>();
+
+  return proxy->CreateFileStreamReader(
+      context->task_runners()->file_task_runner(),
+      url, offset, expected_modification_time);
+}
+
+scoped_ptr<fileapi::FileStreamWriter>
+MountPointProviderDelegate::CreateFileStreamWriter(
+    const fileapi::FileSystemURL& url,
+    int64 offset,
+    fileapi::FileSystemContext* context) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_EQ(fileapi::kFileSystemTypeDrive, url.type());
+
+  fileapi::RemoteFileSystemProxyInterface* proxy =
+      mount_points_->GetRemoteFileSystemProxy(url.filesystem_id());
+  if (!proxy)
+    return scoped_ptr<fileapi::FileStreamWriter>();
+
+  return scoped_ptr<fileapi::FileStreamWriter>(
+      new chromeos::RemoteFileStreamWriter(
+          proxy, url, offset, context->task_runners()->file_task_runner()));
+}
+
+fileapi::FileSystemOperation*
+MountPointProviderDelegate::CreateFileSystemOperation(
+    const fileapi::FileSystemURL& url,
+    fileapi::FileSystemContext* context,
+    base::PlatformFileError* error_code) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_EQ(fileapi::kFileSystemTypeDrive, url.type());
+
+  fileapi::RemoteFileSystemProxyInterface* proxy =
+      mount_points_->GetRemoteFileSystemProxy(url.filesystem_id());
+  if (!proxy) {
+    *error_code = base::PLATFORM_FILE_ERROR_NOT_FOUND;
+    return NULL;
+  }
+
+  return new chromeos::RemoteFileSystemOperation(proxy);
+}
+
+}  // namespace drive