Suppress LongPress/Tap, and TwoFingerTap when TapDown cancels a fling.

content/browser/renderer_host/input/input_router_config_helper.cc

Index: content/browser/renderer_host/input/input_router_config_helper.cc
diff --git a/content/browser/renderer_host/input/input_router_config_helper.cc b/content/browser/renderer_host/input/input_router_config_helper.cc
index 53aaee3f8800c06d437dbbe1be75a8147c05596e..e48618180add7ddc7333f4ea31fe2b54acf70aca 100644
--- a/content/browser/renderer_host/input/input_router_config_helper.cc
+++ b/content/browser/renderer_host/input/input_router_config_helper.cc
@@ -49,9 +49,12 @@ GestureEventQueue::Config GetGestureEventQueueConfig() {
   config.touchscreen_tap_suppression_config.max_cancel_to_down_time =
       base::TimeDelta::FromMilliseconds(
           gesture_config->fling_max_cancel_to_down_time_in_ms());
+  // Tap suppression controller forwards the stashed tapDown when the
+  // tapDownTimer expires. The timer delay should be large enough for a long
+  // press to get suppressed before forwarding the stashed tapDown.

[tdresser, 2016/12/07 19:53:21]

Explain why we need this delay - to protect against a late tap cancel ack.

[sahel, 2016/12/09 16:49:11]

Done.

   config.touchscreen_tap_suppression_config.max_tap_gap_time =
       base::TimeDelta::FromMilliseconds(
-          gesture_config->long_press_time_in_ms());
+          gesture_config->long_press_time_in_ms() + 50);

[tdresser, 2016/12/07 19:53:21]

We should make sure to handle the case where a long press comes after this
timeout.

[sahel, 2016/12/09 16:49:11]

Done.

 
   config.touchpad_tap_suppression_config.enabled =
       gesture_config->fling_touchpad_tap_suppression_enabled();