Pepper Flash: Add trivial C++ wrappers for PPB_Flash_File_{ModuleLocal,FileRef}.

ppapi/tests/test_flash_file.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 PAPPI_TESTS_TEST_FLASH_FILE_H_
 #define PPAPI_TESTS_TEST_FLASH_FILE_H_
 
 #include <string>
 
-#include "ppapi/c/private/ppb_flash_file.h"
 #include "ppapi/tests/test_case.h"
 
 class TestFlashFile: public TestCase {
  public:
   explicit TestFlashFile(TestingInstance* instance);
   virtual ~TestFlashFile();
 
   // TestCase implementation.
   virtual bool Init();
   virtual void RunTests(const std::string& filter);
 
  private:
   // TODO(yzshen): Add more test cases for PPB_Flash_File_ModuleLocal and
   // PPB_Flash_File_FileRef.
   std::string TestCreateTemporaryFile();
 
   // Gets the number of files and directories under the module-local root
   // directory.
-  std::string GetItemCountUnderModuleLocalRoot(int32_t* item_count);
-
-  const PPB_Flash_File_ModuleLocal* module_local_interface_;
+  std::string GetItemCountUnderModuleLocalRoot(size_t* item_count);
 };
 
 #endif  // PPAPI_TESTS_TEST_FLASH_FILE_H_