Re-enable Eager Gesture Recognition on Aura

ui/events/gesture_detection/touch_disposition_gesture_filter.cc

Index: ui/events/gesture_detection/touch_disposition_gesture_filter.cc
diff --git a/ui/events/gesture_detection/touch_disposition_gesture_filter.cc b/ui/events/gesture_detection/touch_disposition_gesture_filter.cc
index 564d014a4c5f94c28a7bd9a72be4ec1c8c84d594..2c7f6ae24394f196997958bf06ac79f450ff559f 100644
--- a/ui/events/gesture_detection/touch_disposition_gesture_filter.cc
+++ b/ui/events/gesture_detection/touch_disposition_gesture_filter.cc
@@ -170,7 +170,8 @@ TouchDispositionGestureFilter::OnGesturePacket(
   return SUCCESS;
 }
 
-void TouchDispositionGestureFilter::OnTouchEventAck(bool event_consumed) {
+void TouchDispositionGestureFilter::OnTouchEventAckForQueueFront(
+    bool event_consumed) {
   // Spurious touch acks from the renderer should not trigger a crash.
   if (IsEmpty() || (Head().empty() && sequences_.size() == 1))
     return;
@@ -207,6 +208,23 @@ void TouchDispositionGestureFilter::OnTouchEventAck(bool event_consumed) {
     FilterAndSendPacket(packet);
   }
   DCHECK(touch_packet_for_current_ack_handled);
+
+  // If the next event has already been acked, process it.
+  if (!sequence.empty() &&
+      sequence.front().ack_state() !=
+          GestureEventDataPacket::AckState::PENDING) {
+    OnTouchEventAckForQueueFront(sequence.front().ack_state() ==
+                                 GestureEventDataPacket::AckState::CONSUMED);
+  }
+}
+
+void TouchDispositionGestureFilter::OnTouchEventAckForQueueBack(
+    bool event_consumed) {
+  DCHECK(!Tail().empty());
+  if (Tail().size() == 1)
+    OnTouchEventAckForQueueFront(event_consumed);
+  else
+    Tail().back().ack(event_consumed);
 }
 
 bool TouchDispositionGestureFilter::IsEmpty() const {