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..f849aed6ca61fc4efc9edab88559dd2aa4d7f46e 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 +49,10 @@ 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());
+  // Long press must get suppressed when a tap down cancels a fling.
   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() * 1.1);

[tdresser, 2016/12/01 18:57:59]

Maybe elaborate a bit here - why does this need to be greater than the long
press time?

Maybe also increment the timer by a fixed amount, instead of multiplying - the
impact is a bit more obvious that way.

[sahel, 2016/12/06 15:18:13]

Done.

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