Ensure acks are sent for all blocking events.

content/renderer/input/render_widget_input_handler.cc

 // 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.
 
 #include "content/renderer/input/render_widget_input_handler.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 
@@ skipping 420 matching lines @@
   TRACE_EVENT_SYNTHETIC_DELAY_END("blink.HandleInputEvent");
 
   // Note that we can't use handling_event_type_ here since it will be overriden
   // by reentrant calls for events after the paused one.
   bool can_send_ack = !(ignore_ack_for_mouse_move_from_debugger_ &&
                         input_event.type == WebInputEvent::MouseMove);
   if (dispatch_type == DISPATCH_TYPE_BLOCKING_NOTIFY_MAIN ||
       dispatch_type == DISPATCH_TYPE_NON_BLOCKING_NOTIFY_MAIN) {
     // |non_blocking| means it was ack'd already by the InputHandlerProxy
     // so let the delegate know the event has been handled.
-    delegate_->NotifyInputEventHandled(input_event.type);
+    delegate_->NotifyInputEventHandled(input_event.type, ack_result);
   }
 
   if ((dispatch_type == DISPATCH_TYPE_BLOCKING ||
        dispatch_type == DISPATCH_TYPE_BLOCKING_NOTIFY_MAIN) &&
       can_send_ack) {
     std::unique_ptr<InputEventAck> response(new InputEventAck(
         input_event.type, ack_result, swap_latency_info,
         std::move(event_overscroll),
         WebInputEventTraits::GetUniqueTouchEventId(input_event)));
     if (rate_limiting_wanted && frame_pending && !widget_->is_hidden()) {
@@ skipping 113 matching lines @@
   if (pending_input_event_ack_) {
     TRACE_EVENT_ASYNC_END0("input",
                            "RenderWidgetInputHandler::ThrottledInputEventAck",
                            pending_input_event_ack_.get());
     delegate_->OnInputEventAck(std::move(pending_input_event_ack_));
   }
   total_input_handling_time_this_frame_ = base::TimeDelta();
 }
 
 }  // namespace content