Delay Input.dispatchKeyEvent response until after key event ack.

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index 6141da6dc17a327adfaad69e89de263e97aec73e..dd33dfef7e3bd79e8eb6aaf0cf2085892f6fed68 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -2153,6 +2153,8 @@ void RenderWidgetHostImpl::OnKeyboardEventAck(
       const NativeWebKeyboardEventWithLatencyInfo& event,
       InputEventAckState ack_result) {
   latency_tracker_.OnInputEventAck(event.event, &event.latency, ack_result);
+  for (auto& input_event_observer : input_event_observers_)
+    input_event_observer.OnInputEventAck(event.event);
 
   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
 
@@ -2173,6 +2175,8 @@ void RenderWidgetHostImpl::OnMouseEventAck(
     InputEventAckState ack_result) {
   latency_tracker_.OnInputEventAck(mouse_event.event, &mouse_event.latency,
                                    ack_result);
+  for (auto& input_event_observer : input_event_observers_)
+    input_event_observer.OnInputEventAck(mouse_event.event);
 }
 
 void RenderWidgetHostImpl::OnWheelEventAck(
@@ -2180,6 +2184,8 @@ void RenderWidgetHostImpl::OnWheelEventAck(
     InputEventAckState ack_result) {
   latency_tracker_.OnInputEventAck(wheel_event.event, &wheel_event.latency,
                                    ack_result);
+  for (auto& input_event_observer : input_event_observers_)
+    input_event_observer.OnInputEventAck(wheel_event.event);
 
   if (!is_hidden() && view_) {
     if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED &&
@@ -2194,6 +2200,8 @@ void RenderWidgetHostImpl::OnGestureEventAck(
     const GestureEventWithLatencyInfo& event,
     InputEventAckState ack_result) {
   latency_tracker_.OnInputEventAck(event.event, &event.latency, ack_result);
+  for (auto& input_event_observer : input_event_observers_)
+    input_event_observer.OnInputEventAck(event.event);
 
   if (view_)
     view_->GestureEventAck(event.event, ack_result);
@@ -2203,6 +2211,8 @@ void RenderWidgetHostImpl::OnTouchEventAck(
     const TouchEventWithLatencyInfo& event,
     InputEventAckState ack_result) {
   latency_tracker_.OnInputEventAck(event.event, &event.latency, ack_result);
+  for (auto& input_event_observer : input_event_observers_)
+    input_event_observer.OnInputEventAck(event.event);
 
   if (touch_emulator_ &&
       touch_emulator_->HandleTouchEventAck(event.event, ack_result)) {