Return a enumeration of the state of handling of InputEvents.

components/html_viewer/touch_handler.cc

Index: components/html_viewer/touch_handler.cc
diff --git a/components/html_viewer/touch_handler.cc b/components/html_viewer/touch_handler.cc
index e99cec83f97aa4b9b7e22f50ba3eccd0ea06b140..88a0d5df58bc6a939cf710305e144fff9a2e6c86 100644
--- a/components/html_viewer/touch_handler.cc
+++ b/components/html_viewer/touch_handler.cc
@@ -184,7 +184,8 @@ void TouchHandler::SendMotionEventToGestureProvider() {
   blink::WebTouchEvent web_event = ui::CreateWebTouchEventFromMotionEvent(
       *current_motion_event_, result.did_generate_scroll);
   gesture_provider_.OnTouchEventAck(web_event.uniqueTouchEventId,
-                                    web_widget_->handleInputEvent(web_event));
+                                    web_widget_->handleInputEvent(web_event) !=
+                                        blink::WebInputEventResult::NotHandled);
 }
 
 void TouchHandler::PostProcessMotionEvent(const mus::mojom::Event& event) {