Fix TAP_DOWN gesture event:

ui/base/gestures/gesture_sequence.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_SEQUENCE_H_
 #define UI_BASE_GESTURES_GESTURE_SEQUENCE_H_
 #pragma once
 
 #include "base/timer.h"
 #include "ui/base/events.h"
@@ skipping 60 matching lines @@
   // Do a linear scan through points_ to find the GesturePoint
   // with id |point_id|.
   GesturePoint* GetPointByPointId(int point_id);
 
   bool IsSecondTouchDownCloseEnoughForTwoFingerTap();
 
   // Functions to be called to add GestureEvents, after successful recognition.
 
   // Tap gestures.
   void AppendTapDownGestureEvent(const GesturePoint& point, Gestures* gestures);
-  void AppendTapUpGestureEvent(const GesturePoint& point, Gestures* gestures);
+  void AppendBeginGestureEvent(const GesturePoint& point, Gestures* gestures);
+  void AppendEndGestureEvent(const GesturePoint& point, Gestures* gestures);
   void AppendClickGestureEvent(const GesturePoint& point, Gestures* gestures);
   void AppendDoubleClickGestureEvent(const GesturePoint& point,
                                      Gestures* gestures);
   void AppendLongPressGestureEvent();
 
   // Scroll gestures.
   void AppendScrollGestureBegin(const GesturePoint& point,
                                 const gfx::Point& location,
                                 Gestures* gestures);
   void AppendScrollGestureEnd(const GesturePoint& point,
@@ skipping 102 matching lines @@
   int point_count_;
 
   GestureEventHelper* helper_;
 
   DISALLOW_COPY_AND_ASSIGN(GestureSequence);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_GESTURES_GESTURE_SEQUENCE_H_