Add Worker support for FileSystem API.

chrome/common/file_system/webfilesystem_callback_dispatcher.h

Index: chrome/common/file_system/webfilesystem_callback_dispatcher.h
diff --git a/chrome/common/file_system/webfilesystem_callback_dispatcher.h b/chrome/common/file_system/webfilesystem_callback_dispatcher.h
new file mode 100644
index 0000000000000000000000000000000000000000..ade811b2975669dd81936bbe4b6176c99c6cf057
--- /dev/null
+++ b/chrome/common/file_system/webfilesystem_callback_dispatcher.h
@@ -0,0 +1,42 @@
+// Copyright (c) 2010 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 CHROME_COMMON_FILE_SYSTEM_WEBFILESYSTEM_CALLBACK_DISPATCHER_H_
+#define CHROME_COMMON_FILE_SYSTEM_WEBFILESYSTEM_CALLBACK_DISPATCHER_H_
+
+#include "base/basictypes.h"
+#include "base/platform_file.h"
+#include "webkit/fileapi/file_system_callback_dispatcher.h"
+
+namespace base {
+namespace file_util_proxy {
+struct Entry;
+}
+}
+
+namespace WebKit {
+class WebFileSystemCallbacks;
+}
+
+class WebFileSystemCallbackDispatcher
+    : public fileapi::FileSystemCallbackDispatcher {
+ public:
+  explicit WebFileSystemCallbackDispatcher(
+      WebKit::WebFileSystemCallbacks* callbacks);
+
+  // FileSystemCallbackDispatcher implementation
+  virtual void DidSucceed();
+  virtual void DidReadMetadata(const base::PlatformFileInfo& file_info);
+  virtual void DidReadDirectory(
+      const std::vector<base::file_util_proxy::Entry>& entries,
+      bool has_more);
+  virtual void DidOpenFileSystem(const std::string&,
+                                 const FilePath&);
+  virtual void DidFail(base::PlatformFileError);
+
+ private:
+  WebKit::WebFileSystemCallbacks* callbacks_;
+};
+
+#endif  // CHROME_COMMON_FILE_SYSTEM_WEBFILESYSTEM_CALLBACK_DISPATCHER_H_