Remove CanChallengePlatform() and CheckPlatformState().

ppapi/tests/test_platform_verification_private.h

 // Copyright 2013 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_PLATFORM_VERIFICATION_PRIVATE_H_
 #define PAPPI_TESTS_TEST_PLATFORM_VERIFICATION_PRIVATE_H_
 
 #include <string>
 
 #include "ppapi/tests/test_case.h"
 
 class TestPlatformVerificationPrivate : public TestCase {
  public:
   explicit TestPlatformVerificationPrivate(TestingInstance* instance);
 
   // TestCase implementation.
   virtual void RunTests(const std::string& filter);
 
  private:
-  std::string TestCanChallengePlatform();
   std::string TestChallengePlatform();
 };
 
 #endif  // PAPPI_TESTS_TEST_PLATFORM_VERIFICATION_PRIVATE_H_