aura: Change long press affordance according to UX mocks.

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 79b46a550aebfc9b9ab4f0475b8e5b11bb3ae349..5ba5f340c29279a9cbb136699efb2e250df5fd4e 100644
--- a/ui/base/gestures/gesture_configuration.cc
+++ b/ui/base/gestures/gesture_configuration.cc
@@ -10,7 +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::semi_long_press_time_in_seconds_ = 0.2;
 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;