SyncFS: Introduce SyncFileSystemBackend

webkit/browser/fileapi/syncable/sync_file_system_backend.h

Index: webkit/browser/fileapi/syncable/sync_file_system_backend.h
diff --git a/webkit/browser/fileapi/syncable/sync_file_system_backend.h b/webkit/browser/fileapi/syncable/sync_file_system_backend.h
new file mode 100644
index 0000000000000000000000000000000000000000..23bb1837ccaea255c5e53c2aef35be330eb1ecaa
--- /dev/null
+++ b/webkit/browser/fileapi/syncable/sync_file_system_backend.h
@@ -0,0 +1,110 @@
+// 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.
+
+#ifndef WEBKIT_BROWSER_FILEAPI_SYNCABLE_SYNC_FILE_SYSTEM_BACKEND_H_
+#define WEBKIT_BROWSER_FILEAPI_SYNCABLE_SYNC_FILE_SYSTEM_BACKEND_H_
+
+#include "webkit/browser/fileapi/file_system_backend.h"
+#include "webkit/browser/fileapi/file_system_quota_util.h"
+#include "webkit/browser/fileapi/sandbox_context.h"
+
+namespace sync_file_system {
+
+class WEBKIT_STORAGE_BROWSER_EXPORT SyncFileSystemBackend
+    : public fileapi::FileSystemBackend,
+      public fileapi::FileSystemQuotaUtil {
+ public:
+  SyncFileSystemBackend();
+  virtual ~SyncFileSystemBackend();
+
+  // FileSystemBackend overrides.
+  virtual bool CanHandleType(fileapi::FileSystemType type) const OVERRIDE;
+  virtual void Initialize(fileapi::FileSystemContext* context) OVERRIDE;
+  virtual void OpenFileSystem(
+      const GURL& origin_url,
+      fileapi::FileSystemType type,
+      fileapi::OpenFileSystemMode mode,
+      const OpenFileSystemCallback& callback) OVERRIDE;
+  virtual fileapi::FileSystemFileUtil* GetFileUtil(
+      fileapi::FileSystemType type) OVERRIDE;
+  virtual fileapi::AsyncFileUtil* GetAsyncFileUtil(
+      fileapi::FileSystemType type) OVERRIDE;
+  virtual fileapi::CopyOrMoveFileValidatorFactory*
+      GetCopyOrMoveFileValidatorFactory(
+          fileapi::FileSystemType type,
+          base::PlatformFileError* error_code) OVERRIDE;
+  virtual fileapi::FileSystemOperation* CreateFileSystemOperation(
+      const fileapi::FileSystemURL& url,
+      fileapi::FileSystemContext* context,
+      base::PlatformFileError* error_code) const OVERRIDE;
+  virtual scoped_ptr<webkit_blob::FileStreamReader> CreateFileStreamReader(
+      const fileapi::FileSystemURL& url,
+      int64 offset,
+      const base::Time& expected_modification_time,
+      fileapi::FileSystemContext* context) const OVERRIDE;
+  virtual scoped_ptr<fileapi::FileStreamWriter> CreateFileStreamWriter(
+      const fileapi::FileSystemURL& url,
+      int64 offset,
+      fileapi::FileSystemContext* context) const OVERRIDE;
+  virtual fileapi::FileSystemQuotaUtil* GetQuotaUtil() OVERRIDE;
+
+  // FileSystemQuotaUtil overrides.
+  virtual base::PlatformFileError DeleteOriginDataOnFileThread(
+      fileapi::FileSystemContext* context,
+      quota::QuotaManagerProxy* proxy,
+      const GURL& origin_url,
+      fileapi::FileSystemType type) OVERRIDE;
+  virtual void GetOriginsForTypeOnFileThread(
+      fileapi::FileSystemType type,
+      std::set<GURL>* origins) OVERRIDE;
+  virtual void GetOriginsForHostOnFileThread(
+      fileapi::FileSystemType type,
+      const std::string& host,
+      std::set<GURL>* origins) OVERRIDE;
+  virtual int64 GetOriginUsageOnFileThread(
+      fileapi::FileSystemContext* context,
+      const GURL& origin_url,
+      fileapi::FileSystemType type) OVERRIDE;
+  virtual void InvalidateUsageCache(
+      const GURL& origin_url,
+      fileapi::FileSystemType type) OVERRIDE;
+  virtual void StickyInvalidateUsageCache(
+      const GURL& origin_url,
+      fileapi::FileSystemType type) OVERRIDE;
+  virtual void AddFileUpdateObserver(
+      fileapi::FileSystemType type,
+      fileapi::FileUpdateObserver* observer,
+      base::SequencedTaskRunner* task_runner) OVERRIDE;
+  virtual void AddFileChangeObserver(
+      fileapi::FileSystemType type,
+      fileapi::FileChangeObserver* observer,
+      base::SequencedTaskRunner* task_runner) OVERRIDE;
+  virtual void AddFileAccessObserver(
+      fileapi::FileSystemType type,
+      fileapi::FileAccessObserver* observer,
+      base::SequencedTaskRunner* task_runner) OVERRIDE;
+  virtual const fileapi::UpdateObserverList* GetUpdateObservers(
+      fileapi::FileSystemType type) const OVERRIDE;
+  virtual const fileapi::ChangeObserverList* GetChangeObservers(
+      fileapi::FileSystemType type) const OVERRIDE;
+  virtual const fileapi::AccessObserverList* GetAccessObservers(
+      fileapi::FileSystemType type) const OVERRIDE;
+
+ private:
+  // Observers for internal sync.
+  fileapi::UpdateObserverList update_observers_;
+  fileapi::ChangeObserverList change_observers_;
+
+  fileapi::UpdateObserverList syncable_update_observers_;
+  fileapi::ChangeObserverList syncable_change_observers_;
+
+  // Owned by FileSystemContext.
+  fileapi::SandboxContext* sandbox_context_;
+
+  DISALLOW_COPY_AND_ASSIGN(SyncFileSystemBackend);
+};
+
+}  // namespace sync_file_system
+
+#endif  // WEBKIT_BROWSER_FILEAPI_SYNCABLE_SYNC_FILE_SYSTEM_BACKEND_H_