Gesture Recognizer: Make short long press time configurable.

ui/base/gestures/gesture_configuration.cc

Index: ui/base/gestures/gesture_configuration.cc
diff --git a/ui/base/gestures/gesture_configuration.cc b/ui/base/gestures/gesture_configuration.cc
index b83a64a655bbe44a6d96c4511d3a15298126928f..79b46a550aebfc9b9ab4f0475b8e5b11bb3ae349 100644
--- a/ui/base/gestures/gesture_configuration.cc
+++ b/ui/base/gestures/gesture_configuration.cc
@@ -10,6 +10,7 @@ namespace ui {
 // associated list of prefs in gesture_prefs_aura.cc.
 int GestureConfiguration::default_radius_ = 15;
 double GestureConfiguration::long_press_time_in_seconds_ = 1.0;
+double GestureConfiguration::semi_long_press_time_in_seconds_ = 0.5;
 double GestureConfiguration::max_distance_for_two_finger_tap_in_pixels_ = 300;
 int GestureConfiguration::max_radius_ = 100;
 double GestureConfiguration::max_seconds_between_double_click_ = 0.7;