Fix movementX/Y attributes for touch pointer events

ui/events/blink/blink_event_util_unittest.cc

Index: ui/events/blink/blink_event_util_unittest.cc
diff --git a/ui/events/blink/blink_event_util_unittest.cc b/ui/events/blink/blink_event_util_unittest.cc
index e4dab1075821f5b95baa68d4a5a9b5003d8da07b..1bee59157f5832fa87e92ad83c5ee0bbe761ba49 100644
--- a/ui/events/blink/blink_event_util_unittest.cc
+++ b/ui/events/blink/blink_event_util_unittest.cc
@@ -28,4 +28,28 @@ TEST(BlinkEventUtilTest, NoScalingWith1DSF) {
   EXPECT_TRUE(ScaleWebInputEvent(event, 2.f));
 }
 
+TEST(BlinkEventUtilTest, TouchEventCoalescing) {
+  blink::WebTouchPoint touch_point;
+  touch_point.id = 1;
+  touch_point.state = blink::WebTouchPoint::StateMoved;
+
+  blink::WebTouchEvent coalesced_event;
+  coalesced_event.setType(blink::WebInputEvent::TouchMove);
+  touch_point.movementX = 5;
+  touch_point.movementY = 10;
+  coalesced_event.touches[coalesced_event.touchesLength++] = touch_point;
+
+  blink::WebTouchEvent event_to_be_coalesced;
+  event_to_be_coalesced.setType(blink::WebInputEvent::TouchMove);
+  touch_point.movementX = 3;
+  touch_point.movementY = -4;
+  event_to_be_coalesced.touches[event_to_be_coalesced.touchesLength++] =
+      touch_point;
+
+  EXPECT_TRUE(CanCoalesce(event_to_be_coalesced, coalesced_event));
+  Coalesce(event_to_be_coalesced, &coalesced_event);
+  EXPECT_EQ(8, coalesced_event.touches[0].movementX);
+  EXPECT_EQ(6, coalesced_event.touches[0].movementY);
+}
+
 }  // namespace ui