Index: content/renderer/render_widget.cc |
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc |
index e3c2602b74c8bdd7d6976db1f6e2ee47f5720cf1..f076fe3a936aec8ff769b59df972a90079ea8721 100644 |
--- a/content/renderer/render_widget.cc |
+++ b/content/renderer/render_widget.cc |
@@ -1229,6 +1229,12 @@ void RenderWidget::OnHandleInputEvent(const blink::WebInputEvent* input_event, |
ack.type = input_event->type; |
ack.state = ack_result; |
ack.latency = swap_latency_info; |
+ if (WebInputEvent::isTouchEventType(ack.type)) { |
+ const blink::WebTouchEvent& touch = |
+ static_cast<const blink::WebTouchEvent&>(*input_event); |
+ DCHECK_NE(touch.uniqueTouchEventId, 0UL); |
+ ack.unique_touch_event_id = touch.uniqueTouchEventId; |
+ } |
scoped_ptr<IPC::Message> response( |
new InputHostMsg_HandleInputEvent_ACK(routing_id_, ack)); |
if (rate_limiting_wanted && frame_pending && !is_hidden_) { |