BacktraceData    6787 test/cctest/test-debug.cc int BacktraceData::frame_counter;
BacktraceData    6795 test/cctest/test-debug.cc   v8::Debug::SetMessageHandler2(BacktraceData::MessageHandler);
BacktraceData    6805 test/cctest/test-debug.cc   BacktraceData::frame_counter = -10;
BacktraceData    6808 test/cctest/test-debug.cc   CHECK_EQ(BacktraceData::frame_counter, 0);
BacktraceData    6814 test/cctest/test-debug.cc   BacktraceData::frame_counter = -10;
BacktraceData    6817 test/cctest/test-debug.cc   CHECK_EQ(BacktraceData::frame_counter, 1);