Send touch cancel to renderer when scrolling starts

content/browser/renderer_host/input/immediate_input_router.cc

 // Copyright 2013 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/browser/renderer_host/input/immediate_input_router.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "content/browser/renderer_host/input/gesture_event_filter.h"
 #include "content/browser/renderer_host/input/input_ack_handler.h"
@@ skipping 540 matching lines @@
 
 void ImmediateInputRouter::ProcessTouchAck(
     InputEventAckState ack_result,
     const ui::LatencyInfo& latency_info) {
   // |touch_event_queue_| will forward to OnTouchEventAck when appropriate.
   touch_event_queue_->ProcessTouchAck(ack_result, latency_info);
 }
 
 void ImmediateInputRouter::HandleGestureScroll(
     const GestureEventWithLatencyInfo& gesture_event) {
-  if (!enable_no_touch_to_renderer_while_scrolling_)
-    return;
-
-  // Once scrolling is started stop forwarding touch move events to renderer.
-  if (gesture_event.event.type == WebInputEvent::GestureScrollBegin)
-    touch_event_queue_->set_no_touch_move_to_renderer(true);
-
-  if (gesture_event.event.type == WebInputEvent::GestureScrollEnd ||
-      gesture_event.event.type == WebInputEvent::GestureFlingStart) {
-    touch_event_queue_->set_no_touch_move_to_renderer(false);
-  }
+  if (enable_no_touch_to_renderer_while_scrolling_)
+    touch_event_queue_->OnGestureScrollEvent(gesture_event);
 }
 
 }  // namespace content