Events ignoring ack disposition receive synthetic acks.

content/browser/renderer_host/input/gesture_event_filter.h

Index: content/browser/renderer_host/input/gesture_event_filter.h
diff --git a/content/browser/renderer_host/input/gesture_event_filter.h b/content/browser/renderer_host/input/gesture_event_filter.h
index 61cb7f7b16d2a8fee62cc67611c4e05c00010995..039513ecaaf3947b5de61c289fef34971a7f9e12 100644
--- a/content/browser/renderer_host/input/gesture_event_filter.h
+++ b/content/browser/renderer_host/input/gesture_event_filter.h
@@ -92,8 +92,7 @@ class CONTENT_EXPORT GestureEventFilter {
  private:
   friend class MockRenderWidgetHost;
   friend class GestureEventFilterTest;
-
-  static bool ShouldIgnoreAckForGestureType(WebKit::WebInputEvent::Type type);
+  friend class ImmediateInputRouterTest;
 
   // TODO(mohsen): There are a bunch of ShouldForward.../ShouldDiscard...
   // methods that are getting confusing. This should be somehow fixed. Maybe
@@ -152,11 +151,6 @@ class CONTENT_EXPORT GestureEventFilter {
   gfx::Transform GetTransformForEvent(
       const GestureEventWithLatencyInfo& gesture_event) const;
 
-  // Pops and sends events ignoring ack from the head of
-  // |coalesced_gesture_events_| until the queue is empty or the event at the
-  // head requires an ack.
-  void SendEventsIgnoringAck();
-
   // Adds |gesture_event| to the |coalesced_gesture_events_|, resetting the
   // accumulation of |combined_scroll_pinch_|.
   void EnqueueEvent(const GestureEventWithLatencyInfo& gesture_event);