Pepper: Add a test for PPB_AudioConfig failure cases.

ppapi/tests/test_audio_config.h

 // 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.
 
 #ifndef PAPPI_TESTS_TEST_AUDIO_CONFIG_H_
 #define PAPPI_TESTS_TEST_AUDIO_CONFIG_H_
 
 #include <string>
 
 #include "ppapi/tests/test_case.h"
 
 struct PPB_AudioConfig;
 struct PPB_Core;
 
 class TestAudioConfig : public TestCase {
  public:
   explicit TestAudioConfig(TestingInstance* instance) : TestCase(instance) {}
 
   // TestCase implementation.
   virtual bool Init();
   virtual void RunTests(const std::string& filter);
 
  private:
-  std::string TestEverything();
+  std::string TestValidConfigs();
+  std::string TestInvalidConfigs();
 
   const PPB_AudioConfig* audio_config_interface_;
   const PPB_Core* core_interface_;
 };
 
 #endif  // PAPPI_TESTS_TEST_AUDIO_CONFIG_H_