I can consistently repro this by tapping with two fingers simultaneously (I was on storage.googleapis.com/watk/v) N5 Marshmallow, ToT chrome_public_apk. 

  0008443b  logging::LogMessage::~LogMessage()                                                                                                                                                                                                                                                                                                /s/c/src/base/logging.cc:748
  00011cf7  ui::MotionEventAndroid::GetX(unsigned int) const                                                                                                                                                                                                                                                                                  /s/c/src/ui/events/android/motion_event_android.cc:221
  00009bf5  ui::GestureDetector::IsWithinTouchSlop(ui::MotionEvent const&)                                                                                                                                                                                                                                                                    /s/c/src/ui/events/gesture_detection/gesture_detector.cc:550
  0000a54f  ui::GestureDetector::OnTouchEvent(ui::MotionEvent const&)                                                                                                                                                                                                                                                                         /s/c/src/ui/events/gesture_detection/gesture_detector.cc:306
  0000cdcf  ui::GestureProvider::GestureListenerImpl::OnTouchEvent(ui::MotionEvent const&)                                                                                                                                                                                                                                                    /s/c/src/ui/events/gesture_detection/gesture_provider.cc:122
  0000d9d5  ui::GestureProvider::OnTouchEvent(ui::MotionEvent const&)                                                                                                                                                                                                                                                                         /s/c/src/ui/events/gesture_detection/gesture_provider.cc:774
  00009263  ui::FilteredGestureProvider::OnTouchEvent(ui::MotionEvent const&)                                                                                                                                                                                                                                                                 /s/c/src/ui/events/gesture_detection/filtered_gesture_provider.cc:37
  008e7aa9  content::RenderWidgetHostViewAndroid::OnTouchEvent(ui::MotionEvent const&)                                                                                                                                                                                                                                                        /s/c/src/content/browser/renderer_host/render_widget_host_view_android.cc:723