Ensure acks are sent for all blocking events.

content/renderer/render_widget.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 196 matching lines @@
   // RenderWidgetInputHandlerDelegate
   void FocusChangeComplete() override;
   bool HasTouchEventHandlersAt(const gfx::Point& point) const override;
   void ObserveGestureEventAndResult(const blink::WebGestureEvent& gesture_event,
                                     const gfx::Vector2dF& unused_delta,
                                     bool event_processed) override;
 
   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;
   bool WillHandleGestureEvent(const blink::WebGestureEvent& event) override;
   bool WillHandleMouseEvent(const blink::WebMouseEvent& event) override;
 
   // RenderWidgetScreenMetricsDelegate
   void Redraw() override;
   void Resize(const ResizeParams& resize_params) override;
   void SetScreenMetricsEmulationParameters(
@@ skipping 542 matching lines @@
 
   // Indicates whether this widget has focus.
   bool has_focus_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_