Add a MotionEventGeneric implementation

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 7424ee8edfbfdde3c8f65d2b2541ba6501fc399e..4a7887e5493a54fd74145ce79d52256496f9ebe7 100644
--- a/ui/events/gesture_detection/touch_disposition_gesture_filter_unittest.cc
+++ b/ui/events/gesture_detection/touch_disposition_gesture_filter_unittest.cc
@@ -37,9 +37,9 @@ class TouchDispositionGestureFilterTest
     last_sent_gesture_location_ = gfx::PointF(event.x, event.y);
     last_sent_gesture_raw_location_ = gfx::PointF(event.raw_x, event.raw_y);
     if (cancel_after_next_gesture_) {
+      cancel_after_next_gesture_ = false;
       CancelTouchPoint();
       SendTouchNotConsumedAck();
-      cancel_after_next_gesture_ = false;
     }
   }
 
@@ -574,11 +574,11 @@ TEST_F(TouchDispositionGestureFilterTest, MultipleTouchSequences) {
 
 TEST_F(TouchDispositionGestureFilterTest, FlingCancelledOnNewTouchSequence) {
   const gfx::Vector2dF raw_offset(1.3f, 3.7f);
-  SetRawTouchOffset(raw_offset);
   // Simulate a fling.
   PushGesture(ET_GESTURE_TAP_DOWN);
   PushGesture(ET_GESTURE_SCROLL_BEGIN);
   PressTouchPoint(1, 1);
+  SetRawTouchOffset(raw_offset);
   SendTouchNotConsumedAck();
   EXPECT_TRUE(GesturesMatch(
       Gestures(