Add C++ wrappers for output parameters.

ppapi/tests/test_flash.cc

 // Copyright (c) 2011 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.
 
 #include "ppapi/tests/test_flash.h"
 
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/private/ppb_flash.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/module.h"
@@ skipping 54 matching lines @@
                flash_interface_->GetProxyForURL(instance_->pp_instance(),
                                                 "this_isnt_an_url"));
   // Should be an error.
   ASSERT_TRUE(result.is_undefined());
 
   PASS();
 }
 
 std::string TestFlash::TestMessageLoop() {
   pp::CompletionCallback callback =
-      callback_factory_.NewRequiredCallback(&TestFlash::QuitMessageLoopTask);
+      callback_factory_.NewCallback(&TestFlash::QuitMessageLoopTask);
   pp::Module::Get()->core()->CallOnMainThread(0, callback);
   flash_interface_->RunMessageLoop(instance_->pp_instance());
 
   PASS();
 }
 
 std::string TestFlash::TestGetLocalTimeZoneOffset() {
   double result = flash_interface_->GetLocalTimeZoneOffset(
       instance_->pp_instance(), 1321491298.0);
   // The result depends on the local time zone, but +/- 14h from UTC should
   // cover the possibilities.
   ASSERT_TRUE(result >= -14 * 60 * 60);
   ASSERT_TRUE(result <= 14 * 60 * 60);
 
   PASS();
 }
 
 std::string TestFlash::TestGetCommandLineArgs() {
   Var result(pp::PASS_REF,
              flash_interface_->GetCommandLineArgs(
                  pp::Module::Get()->pp_module()));
   ASSERT_TRUE(result.is_string());
 
   PASS();
 }
 
 void TestFlash::QuitMessageLoopTask(int32_t) {
   flash_interface_->QuitMessageLoop(instance_->pp_instance());
 }