Change default values of some gesture related constants

ui/base/gestures/gesture_configuration.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_BASE_GESTURES_GESTURE_CONFIGURATION_H_
 #define UI_BASE_GESTURES_GESTURE_CONFIGURATION_H_
 
 #include "base/basictypes.h"
 #include "ui/base/ui_export.h"
 
@@ skipping 55 matching lines @@
   }
   static void set_max_touch_down_duration_in_seconds_for_click(double val) {
     max_touch_down_duration_in_seconds_for_click_ = val;
   }
   static double max_touch_move_in_pixels_for_click() {
     return max_touch_move_in_pixels_for_click_;
   }
   static void set_max_touch_move_in_pixels_for_click(double val) {
     max_touch_move_in_pixels_for_click_ = val;
   }
+  static double max_distance_between_taps_for_double_tap() {
+    return max_distance_between_taps_for_double_tap_;
+  }
+  static void set_max_distance_between_taps_for_double_tap(double val) {
+    max_distance_between_taps_for_double_tap_ = val;
+  }
   static double min_distance_for_pinch_scroll_in_pixels() {
     return min_distance_for_pinch_scroll_in_pixels_;
   }
   static void set_min_distance_for_pinch_scroll_in_pixels(double val) {
     min_distance_for_pinch_scroll_in_pixels_ = val;
   }
   static double min_flick_speed_squared() {
     return min_flick_speed_squared_;
   }
   static void set_min_flick_speed_squared(double val) {
@@ skipping 72 matching lines @@
   // forming an ET_GESTURE_TAP event.
   static int max_radius_;
 
   static double long_press_time_in_seconds_;
   static double semi_long_press_time_in_seconds_;
   static double max_seconds_between_double_click_;
   static double max_separation_for_gesture_touches_in_pixels_;
   static double max_swipe_deviation_ratio_;
   static double max_touch_down_duration_in_seconds_for_click_;
   static double max_touch_move_in_pixels_for_click_;
+  static double max_distance_between_taps_for_double_tap_;
   static double min_distance_for_pinch_scroll_in_pixels_;
   static double min_flick_speed_squared_;
   static double min_pinch_update_distance_in_pixels_;
   static double min_rail_break_velocity_;
   static double min_scroll_delta_squared_;
   static double min_swipe_speed_;
   static double min_touch_down_duration_in_seconds_for_click_;
   static int points_buffered_for_velocity_;
   static double rail_break_proportion_;
   static double rail_start_proportion_;
   static double touchscreen_fling_acceleration_adjustment_;
 
   DISALLOW_COPY_AND_ASSIGN(GestureConfiguration);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_GESTURES_GESTURE_CONFIGURATION_H_