Introduces an additional extension loader that load extra extensions based on per-extension json fi…

chrome/browser/extensions/external_filesystem_extension_loader_linux.h

Index: chrome/browser/extensions/external_filesystem_extension_loader_linux.h
===================================================================
--- chrome/browser/extensions/external_filesystem_extension_loader_linux.h	(revision 0)
+++ chrome/browser/extensions/external_filesystem_extension_loader_linux.h	(revision 0)
@@ -0,0 +1,30 @@
+// 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 CHROME_BROWSER_EXTENSIONS_EXTERNAL_FILESYSTEM_EXTENSION_LOADER_LINUX_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTERNAL_FILESYSTEM_EXTENSION_LOADER_LINUX_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "chrome/browser/extensions/external_extension_loader.h"
+
+class ExternalFilesystemExtensionLoader : public ExternalExtensionLoader {
+ public:
+  ExternalFilesystemExtensionLoader() {}
+
+ protected:
+  virtual void StartLoading() OVERRIDE;
+
+ private:
+  friend class base::RefCountedThreadSafe<ExternalExtensionLoader>;
+
+  virtual ~ExternalFilesystemExtensionLoader() {}
+
+  void LoadOnFileThread();
+
+  DISALLOW_COPY_AND_ASSIGN(ExternalFilesystemExtensionLoader);
+};
+
+#endif
+