Ensure acks are sent for all blocking events.

content/renderer/input/render_widget_input_handler_delegate.h

 // Copyright 2015 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_INPUT_RENDER_WIDGET_INPUT_HANDLER_DELEGATE_H_
 #define CONTENT_RENDERER_INPUT_RENDER_WIDGET_INPUT_HANDLER_DELEGATE_H_
 
 #include <memory>
 
 #include "content/common/content_export.h"
@@ skipping 52 matching lines @@
   // Notifies that an overscroll was completed from Blink.
   virtual void OnDidOverscroll(const DidOverscrollParams& params) = 0;
 
   // Called when an ACK is ready to be sent to the input event provider.
   virtual void OnInputEventAck(
       std::unique_ptr<InputEventAck> input_event_ack) = 0;
 
   // Called when an event with a notify dispatch type
   // (DISPATCH_TYPE_*_NOTIFY_MAIN) of |handled_type| has been processed
   // by the main thread.
-  virtual void NotifyInputEventHandled(
-      blink::WebInputEvent::Type handled_type) = 0;
+  virtual void NotifyInputEventHandled(blink::WebInputEvent::Type handled_type,
+                                       InputEventAckState ack_result) = 0;
 
   // Notifies the delegate of the |input_handler| managing it.
   virtual void SetInputHandler(RenderWidgetInputHandler* input_handler) = 0;
 
   // |show_ime| should be ShowIme::IF_NEEDED iff the update may cause the ime to
   // be displayed, e.g. after a tap on an input field on mobile.
   // |change_source| should be ChangeSource::FROM_NON_IME when the renderer has
   // to wait for the browser to acknowledge the change before the renderer
   // handles any more IME events. This is when the text change did not originate
   // from the IME in the browser side, such as changes by JavaScript or
@@ skipping 11 matching lines @@
   // won't be sent to WebKit or trigger DidHandleMouseEvent().
   virtual bool WillHandleMouseEvent(const blink::WebMouseEvent& event) = 0;
 
  protected:
   virtual ~RenderWidgetInputHandlerDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_INPUT_RENDER_WIDGET_INPUT_HANDLER_DELEGATE_H_