Send TapCancel when a second finger is pressed.

ui/events/gesture_detection/touch_disposition_gesture_filter_unittest.cc

Index: ui/events/gesture_detection/touch_disposition_gesture_filter_unittest.cc
diff --git a/ui/events/gesture_detection/touch_disposition_gesture_filter_unittest.cc b/ui/events/gesture_detection/touch_disposition_gesture_filter_unittest.cc
index 391c66968f7cf642f503a2cc4cb84ff90ff96776..5ca210a07e3c88a5dfea5d1070fd25c0be995575 100644
--- a/ui/events/gesture_detection/touch_disposition_gesture_filter_unittest.cc
+++ b/ui/events/gesture_detection/touch_disposition_gesture_filter_unittest.cc
@@ -711,21 +711,18 @@ TEST_F(TouchDispositionGestureFilterTest,
        TapNotCancelledIfTapEndingEventReceived) {
   PushGesture(ET_GESTURE_TAP_DOWN);
   PressTouchPoint(1, 1);
-  PressTouchPoint(2, 2);
-  SendTouchNotConsumedAck();
   SendTouchNotConsumedAck();
-  EXPECT_TRUE(GesturesMatch(Gestures(ET_GESTURE_TAP_DOWN),
-                            GetAndResetSentGestures()));
+  EXPECT_TRUE(
+      GesturesMatch(Gestures(ET_GESTURE_TAP_DOWN), GetAndResetSentGestures()));
 
   PushGesture(ET_GESTURE_TAP);
   ReleaseTouchPoint();
   SendTouchNotConsumedAck();
-  EXPECT_TRUE(GesturesMatch(Gestures(ET_GESTURE_SHOW_PRESS,
-                                     ET_GESTURE_TAP),
+  EXPECT_TRUE(GesturesMatch(Gestures(ET_GESTURE_SHOW_PRESS, ET_GESTURE_TAP),
                             GetAndResetSentGestures()));
 
   // The tap should not be cancelled as it was terminated by a |ET_GESTURE_TAP|.
-  ReleaseTouchPoint();
+  PressTouchPoint(2, 2);
   SendTouchConsumedAck();
   EXPECT_FALSE(GesturesSent());
 }
@@ -1027,4 +1024,17 @@ TEST_F(TouchDispositionGestureFilterTest, TestDisallowedMultiFingerSwipe) {
   EXPECT_FALSE(GesturesSent());
 }
 
+TEST_F(TouchDispositionGestureFilterTest, TapCancelOnSecondFingerDown) {
+  PushGesture(ET_GESTURE_TAP_DOWN);
+  PressTouchPoint(1, 1);
+  SendTouchNotConsumedAck();
+  EXPECT_TRUE(GesturesMatch(Gestures(ET_GESTURE_TAP_DOWN),
+                            GetAndResetSentGestures()));
+
+  PressTouchPoint(1, 1);
+  SendTouchNotConsumedAck();
+  EXPECT_TRUE(GesturesMatch(Gestures(ET_GESTURE_TAP_CANCEL),
+                            GetAndResetSentGestures()));
+}
+
 }  // namespace ui