  void ClearCache(v8::Isolate* isolate) {
    isolate->IdleNotificationDeadline(0.5);
    blink::WebCache::Clear();
    base::MemoryPressureListener::NotifyMemoryPressure(
        base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL);
  }
  void ClearCache(v8::Isolate* isolate) {
    isolate->IdleNotificationDeadline(0.5);
    blink::WebCache::Clear();
    base::MemoryPressureListener::NotifyMemoryPressure(
        base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL);
  }