ppapi: Cleanup class/struct forward declarations

ppapi/tests/test_url_request.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_URL_REQUEST_H_
 #define PAPPI_TESTS_TEST_URL_REQUEST_H_
 
 #include <string>
 
 #include "ppapi/c/ppb_core.h"
 #include "ppapi/c/ppb_url_loader.h"
 #include "ppapi/c/ppb_url_request_info.h"
 #include "ppapi/c/ppb_url_response_info.h"
 #include "ppapi/c/ppb_var.h"
 #include "ppapi/tests/test_case.h"
 
-namespace pp {
-class FileRef;
-}
-
 class TestURLRequest : public TestCase {
  public:
   explicit TestURLRequest(TestingInstance* instance);
 
   // TestCase implementation.
   virtual bool Init();
   virtual void RunTests(const std::string& filter);
 
  private:
   std::string TestCreateAndIsURLRequestInfo();
   std::string TestSetProperty();
   std::string TestAppendDataToBody();
   std::string TestAppendFileToBody();
   std::string TestStress();
 
   // Helpers.
   PP_Var PP_MakeString(const char* s);
   std::string LoadAndCompareBody(PP_Resource url_request,
                                  const std::string& expected_body);
 
   const PPB_URLRequestInfo* ppb_url_request_interface_;
   const PPB_URLLoader* ppb_url_loader_interface_;
   const PPB_URLResponseInfo* ppb_url_response_interface_;
   const PPB_Core* ppb_core_interface_;
   const PPB_Var* ppb_var_interface_;
 };
 
 #endif  // PAPPI_TESTS_TEST_URL_REQUEST_H_