Move a bunch of child-only code from content/common to content/child

content/common/database_util.h

-// Copyright (c) 2012 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 CONTENT_COMMON_DATABASE_UTIL_H_
-#define CONTENT_COMMON_DATABASE_UTIL_H_
-
-#include "webkit/glue/webkitplatformsupport_impl.h"
-
-namespace content {
-// A class of utility functions used by RendererWebKitPlatformSupportImpl and
-// WorkerWebKitPlatformSupportImpl to handle database file accesses.
-class DatabaseUtil {
- public:
-  static WebKit::Platform::FileHandle DatabaseOpenFile(
-      const WebKit::WebString& vfs_file_name, int desired_flags);
-  static int DatabaseDeleteFile(
-      const WebKit::WebString& vfs_file_name, bool sync_dir);
-  static long DatabaseGetFileAttributes(
-      const WebKit::WebString& vfs_file_name);
-  static long long DatabaseGetFileSize(
-      const WebKit::WebString& vfs_file_name);
-  static long long DatabaseGetSpaceAvailable(
-      const WebKit::WebString& origin_identifier);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_COMMON_DATABASE_UTIL_H_