ChallengePlatform 39 ppapi/cpp/private/platform_verification.cc int32_t PlatformVerification::ChallengePlatform( ChallengePlatform 33 ppapi/proxy/platform_verification_private_resource.cc int32_t PlatformVerificationPrivateResource::ChallengePlatform( ChallengePlatform 35 ppapi/thunk/ppb_platform_verification_private_thunk.cc int32_t ChallengePlatform(PP_Resource instance,