Events ignoring ack disposition receive synthetic acks.

content/browser/renderer_host/input/gesture_event_filter.cc

Index: content/browser/renderer_host/input/gesture_event_filter.cc
diff --git a/content/browser/renderer_host/input/gesture_event_filter.cc b/content/browser/renderer_host/input/gesture_event_filter.cc
index 62fcb9c34fc20f2fefd547b4c3eafde17eb7ff14..1a394d582065a51c85dcfa41e5495ed0d8104acf 100644
--- a/content/browser/renderer_host/input/gesture_event_filter.cc
+++ b/content/browser/renderer_host/input/gesture_event_filter.cc
@@ -162,19 +162,12 @@ bool GestureEventFilter::ShouldForwardForCoalescing(
       break;
   }
   EnqueueEvent(gesture_event);
-
-  // Ensure that if the added event ignores its ack, it is fired and
-  // removed from |coalesced_gesture_events_|.
-  SendEventsIgnoringAck();
   return ShouldHandleEventNow();
 }
 
 void GestureEventFilter::ProcessGestureAck(InputEventAckState ack_result,
                                            WebInputEvent::Type type,
                                            const ui::LatencyInfo& latency) {
-  if (ShouldIgnoreAckForGestureType(type))
-    return;
-
   if (coalesced_gesture_events_.empty()) {
     DLOG(ERROR) << "Received unexpected ACK for event type " << type;
     return;
@@ -197,9 +190,6 @@ void GestureEventFilter::ProcessGestureAck(InputEventAckState ack_result,
       touchpad_tap_suppression_controller_->GestureFlingCancelAck(processed);
   }
   coalesced_gesture_events_.pop_front();
-  // If the event which was just ACKed was blocking events ignoring ack, fire
-  // those events now.
-  SendEventsIgnoringAck();
   if (ignore_next_ack_) {
     ignore_next_ack_ = false;
   } else if (!coalesced_gesture_events_.empty()) {
@@ -362,25 +352,6 @@ gfx::Transform GestureEventFilter::GetTransformForEvent(
   return gesture_transform;
 }
 
-void GestureEventFilter::SendEventsIgnoringAck() {
-  GestureEventWithLatencyInfo gesture_event;
-  while (!coalesced_gesture_events_.empty()) {
-    gesture_event = coalesced_gesture_events_.front();
-    if (!GestureEventFilter::ShouldIgnoreAckForGestureType(
-            gesture_event.event.type)) {
-      return;
-    }
-    coalesced_gesture_events_.pop_front();
-    client_->SendGestureEventImmediately(gesture_event);
-  }
-}
-
-bool GestureEventFilter::ShouldIgnoreAckForGestureType(
-    WebInputEvent::Type type) {
-  return type == WebInputEvent::GestureTapDown ||
-      type == WebInputEvent::GestureShowPress;
-}
-
 void GestureEventFilter::EnqueueEvent(
     const GestureEventWithLatencyInfo& gesture_event) {
   coalesced_gesture_events_.push_back(gesture_event);