Re-enable Eager Gesture Recognition on Aura

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index a735aff095f707f38d36f69c7fe8b78be89dc7c5..beed162304772a68692049cdd5c6c8d091691b53 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -1168,7 +1168,7 @@ void RenderWidgetHostViewAura::ProcessAckedTouchEvent(
     return;
 
   aura::WindowTreeHost* host = window_->GetHost();
-  // |host| is NULL during tests.
+  // |host| may be null during tests.
   if (!host)
     return;
 
@@ -2037,8 +2037,10 @@ void RenderWidgetHostViewAura::OnTouchEvent(ui::TouchEvent* event) {
     return;
 
   // Update the touch event first.
-  blink::WebTouchPoint* point = UpdateWebTouchEventFromUIEvent(*event,
-                                                                &touch_event_);
+  blink::WebTouchPoint* point =
+      UpdateWebTouchEventFromUIEvent(*event, &touch_event_);
+
+  bool should_forward = host_->ShouldForwardTouchEvent();
 
   // Forward the touch event only if a touch point was updated, and there's a
   // touch-event handler in the page, and no other touch-event is in the queue.
@@ -2046,14 +2048,17 @@ void RenderWidgetHostViewAura::OnTouchEvent(ui::TouchEvent* event) {
   // handler in the page, or some touch-event is already in the queue, even if
   // no point has been updated, to make sure that this event does not get
   // processed by the gesture recognizer before the events in the queue.
-  if (host_->ShouldForwardTouchEvent())
+  if (point && should_forward) {
+    DCHECK(window_->GetHost());
+    if (window_->GetHost()->dispatcher()->OnProcessingTouchEventAsync(event))
+      host_->ForwardTouchEventWithLatencyInfo(touch_event_, *event->latency());
+  }
+
+  if (should_forward)
     event->StopPropagation();
 
-  if (point) {
-    if (host_->ShouldForwardTouchEvent())
-      host_->ForwardTouchEventWithLatencyInfo(touch_event_, *event->latency());
+  if (point)
     UpdateWebTouchEventAfterDispatch(&touch_event_, point);
-  }
 }
 
 void RenderWidgetHostViewAura::OnGestureEvent(ui::GestureEvent* event) {