gdata: Add requestDirectoryRefresh to file_browser_private.

chrome/browser/chromeos/extensions/file_browser_private_api.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 CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_BROWSER_PRIVATE_API_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_BROWSER_PRIVATE_API_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 592 matching lines @@
 
 // Implements the chrome.fileBrowserPrivate.getNetworkConnectionState method.
 class GetNetworkConnectionStateFunction : public SyncExtensionFunction {
  protected:
   virtual bool RunImpl() OVERRIDE;
  private:
   DECLARE_EXTENSION_FUNCTION_NAME(
       "fileBrowserPrivate.getNetworkConnectionState");
 };
 
+// Implements the chrome.fileBrowserPrivate.requestDirectoryRefresh method.
+class RequestDirectoryRefreshFunction : public SyncExtensionFunction {
+ protected:
+  virtual bool RunImpl() OVERRIDE;
+ private:
+  DECLARE_EXTENSION_FUNCTION_NAME(
+      "fileBrowserPrivate.requestDirectoryRefresh");
+};
+
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_BROWSER_PRIVATE_API_H_