[Android] Support double-tap selection

ui/events/gesture_detection/gesture_configuration.h

 // Copyright 2014 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_EVENTS_GESTURE_DETECTION_GESTURE_CONFIGURATION_H_
 #define UI_EVENTS_GESTURE_DETECTION_GESTURE_CONFIGURATION_H_
 
 #include "base/basictypes.h"
 #include "ui/events/gesture_detection/gesture_detection_export.h"
 #include "ui/events/gesture_detection/velocity_tracker.h"
@@ skipping 54 matching lines @@
   }
   void set_max_distance_between_taps_for_double_tap(float val) {
     max_distance_between_taps_for_double_tap_ = val;
   }
   float max_distance_for_two_finger_tap_in_pixels() const {
     return max_distance_for_two_finger_tap_in_pixels_;
   }
   void set_max_distance_for_two_finger_tap_in_pixels(float val) {
     max_distance_for_two_finger_tap_in_pixels_ = val;
   }
+  int max_tap_count() const { return max_tap_count_; }
+  void set_max_tap_count(int count) { max_tap_count_ = count; }
   float max_fling_velocity() const { return max_fling_velocity_; }
   void set_max_fling_velocity(float val) { max_fling_velocity_ = val; }
   float max_gesture_bounds_length() const {
     return max_gesture_bounds_length_;
   }
   void set_max_gesture_bounds_length(float val) {
     max_gesture_bounds_length_ = val;
   }
   float max_separation_for_gesture_touches_in_pixels() const {
     return max_separation_for_gesture_touches_in_pixels_;
@@ skipping 132 matching lines @@
   // mousedown is considered associated with the cancel event.
   int fling_max_cancel_to_down_time_in_ms_;
 
   // Maxium time between a mousedown/mouseup pair that is considered to be a
   // suppressable tap.
   int fling_max_tap_gap_time_in_ms_;
   bool gesture_begin_end_types_enabled_;
   int long_press_time_in_ms_;
   float max_distance_between_taps_for_double_tap_;
 
+  // The max length of a repeated tap sequence, e.g., to support double-click
+  // only this is 2, to support triple-click it's 3.
+  int max_tap_count_;
+
   // The maximum allowed distance between two fingers for a two finger tap. If
   // the distance between two fingers is greater than this value, we will not
   // recognize a two finger tap.
   float max_distance_for_two_finger_tap_in_pixels_;
   float max_fling_velocity_;
   float max_gesture_bounds_length_;
   float max_separation_for_gesture_touches_in_pixels_;
   float max_swipe_deviation_angle_;
   int max_time_between_double_click_in_ms_;
   int max_touch_down_duration_for_click_in_ms_;
@@ skipping 16 matching lines @@
   int tab_scrub_activation_delay_in_ms_;
   bool two_finger_tap_enabled_;
   VelocityTracker::Strategy velocity_tracker_strategy_;
 
   DISALLOW_COPY_AND_ASSIGN(GestureConfiguration);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_GESTURE_DETECTION_GESTURE_CONFIGURATION_H_