Add IPC plumbing code for FileSystem API's openFileSystem

chrome/browser/file_system/file_system_dispatcher_host.h

Index: chrome/browser/file_system/file_system_dispatcher_host.h
diff --git a/chrome/browser/file_system/file_system_dispatcher_host.h b/chrome/browser/file_system/file_system_dispatcher_host.h
new file mode 100644
index 0000000000000000000000000000000000000000..dbe18a8c20d6c04faafab2286f7d73f990ca72e7
--- /dev/null
+++ b/chrome/browser/file_system/file_system_dispatcher_host.h
@@ -0,0 +1,46 @@
+// 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_BROWSER_FILE_SYSTEM_FILE_SYSTEM_DISPATCHER_HOST_H_
+#define CHROME_BROWSER_FILE_SYSTEM_FILE_SYSTEM_DISPATCHER_HOST_H_
+
+#include "base/basictypes.h"
+#include "base/nullable_string16.h"
+#include "base/process.h"
+#include "base/ref_counted.h"
+#include "chrome/common/render_messages.h"
+
+class HostContentSettingsMap;
+class Receiver;
+class ResourceMessageFilter;
+
+class FileSystemDispatcherHost
+    : public base::RefCountedThreadSafe<FileSystemDispatcherHost> {
+ public:
+  FileSystemDispatcherHost(IPC::Message::Sender* sender,
+                           HostContentSettingsMap* host_content_settings_map);
+  void Init(base::ProcessHandle process_handle);
+  void Shutdown();
+
+  bool OnMessageReceived(const IPC::Message& message, bool* message_was_ok);
+
+  void OnOpenFileSystem(const ViewHostMsg_OpenFileSystemRequest_Params&);
+  // TODO(kinuko): add more methods.
+
+  void Send(IPC::Message* message);
+
+ private:
+  // The sender to be used for sending out IPC messages.
+  IPC::Message::Sender* message_sender_;
+
+  // The handle of this process.
+  base::ProcessHandle process_handle_;
+
+  bool shutdown_;
+
+  // Used to look up permissions.
+  scoped_refptr<HostContentSettingsMap> host_content_settings_map_;
+};
+
+#endif  // CHROME_BROWSER_FILE_SYSTEM_FILE_SYSTEM_DISPATCHER_HOST_H_