Ensure acks are sent for all blocking events.

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index 1c59268e2dc5d0d18525ba83de7fe251aaf6623c..605b92ef67f443970001d930882b54f883883913 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -214,8 +214,8 @@ class CONTENT_EXPORT RenderWidget
   void OnDidHandleKeyEvent() override;
   void OnDidOverscroll(const DidOverscrollParams& params) override;
   void OnInputEventAck(std::unique_ptr<InputEventAck> input_event_ack) override;
-  void NotifyInputEventHandled(
-      blink::WebInputEvent::Type handled_type) override;
+  void NotifyInputEventHandled(blink::WebInputEvent::Type handled_type,
+                               InputEventAckState ack_result) override;
   void SetInputHandler(RenderWidgetInputHandler* input_handler) override;
   void UpdateTextInputState(ShowIme show_ime,
                             ChangeSource change_source) override;