Pass tap count (1 or 2) with tap gesture events

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 "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 578 matching lines @@
                                               Gestures* gestures) {
   gestures->push_back(CreateGestureEvent(
       GestureEventDetails(ui::ET_GESTURE_END, 0, 0),
       point.first_touch_position(),
       flags_,
       base::Time::FromDoubleT(point.last_touch_time()),
       1 << point.touch_id()));
 }
 
 void GestureSequence::AppendClickGestureEvent(const GesturePoint& point,
+                                              int tap_count,
                                               Gestures* gestures) {
   gfx::Rect er = point.enclosing_rectangle();
   gfx::Point center = er.CenterPoint();
   gestures->push_back(CreateGestureEvent(
-      GestureEventDetails(ui::ET_GESTURE_TAP, 0, 0),
+      GestureEventDetails(ui::ET_GESTURE_TAP, tap_count, 0),
       center,
       flags_,
       base::Time::FromDoubleT(point.last_touch_time()),
       1 << point.touch_id()));
 }
 
 void GestureSequence::AppendDoubleClickGestureEvent(const GesturePoint& point,
                                                     Gestures* gestures) {
   gestures->push_back(CreateGestureEvent(
       GestureEventDetails(ui::ET_GESTURE_DOUBLE_TAP, 0, 0),
@@ skipping 132 matching lines @@
       point->enclosing_rectangle().CenterPoint(),
       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)) {
-    AppendClickGestureEvent(point, gestures);
-    if (point.IsInDoubleClickWindow(event))
+    bool double_tap = point.IsInDoubleClickWindow(event);
+    AppendClickGestureEvent(point, double_tap ? 2 : 1, gestures);
+    if (double_tap)
       AppendDoubleClickGestureEvent(point, gestures);
     return true;
   }
   return false;
 }
 
 bool GestureSequence::ScrollStart(const TouchEvent& event,
     GesturePoint& point, Gestures* gestures) {
   DCHECK(state_ == GS_PENDING_SYNTHETIC_CLICK);
   if (point.IsInClickWindow(event) ||
@@ skipping 242 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.GetLocation()))
     long_press_timer_->Stop();
 }
 
 }  // namespace ui