Generate tap gesture with tap_count = 3 for triple-tap

ui/base/gestures/gesture_sequence.cc

 // 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.
 
 #include "ui/base/gestures/gesture_sequence.h"
 
 #include <cmath>
 #include <stdlib.h>
 
 #include "base/logging.h"
@@ skipping 829 matching lines @@
       flags_,
       base::Time::FromDoubleT(point->last_touch_time()),
       1 << point->touch_id()));
 }
 
 bool GestureSequence::Click(const TouchEvent& event,
                             const GesturePoint& point,
                             Gestures* gestures) {
   DCHECK(state_ == GS_PENDING_SYNTHETIC_CLICK);
   if (point.IsInClickWindow(event)) {
-    bool double_tap = point.IsInDoubleClickWindow(event);
-    AppendClickGestureEvent(point, double_tap ? 2 : 1, gestures);
+    int tap_count = 1;
+    if (point.IsInTripleClickWindow(event))
+      tap_count = 3;
+    else if (point.IsInDoubleClickWindow(event))
+      tap_count = 2;
+    AppendClickGestureEvent(point, tap_count, gestures);
     return true;
   } else if (point.IsInsideManhattanSquare(event) &&
       !GetLongPressTimer()->IsRunning()) {
     AppendLongTapGestureEvent(point, gestures);
   }
   return false;
 }
 
 bool GestureSequence::ScrollStart(const TouchEvent& event,
                                   GesturePoint& point,
@@ skipping 275 matching lines @@
     return;
 
   // Since long press timer has been started, there should be a non-NULL point.
   const GesturePoint* point = GetPointByPointId(0);
   if (!ui::gestures::IsInsideManhattanSquare(point->first_touch_position(),
       event.location()))
     GetLongPressTimer()->Stop();
 }
 
 }  // namespace ui