GpuWatchdogTaskObserver 90 content/gpu/gpu_watchdog_thread.cc GpuWatchdogThread::GpuWatchdogTaskObserver::GpuWatchdogTaskObserver( GpuWatchdogTaskObserver 95 content/gpu/gpu_watchdog_thread.cc GpuWatchdogThread::GpuWatchdogTaskObserver::~GpuWatchdogTaskObserver() {