Deprecate use of user gestures during scroll-related touch events

third_party/WebKit/Source/core/input/PointerEventManager.cpp

 // Copyright 2016 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 "core/input/PointerEventManager.h"
 
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/shadow/FlatTreeTraversal.h"
 #include "core/events/MouseEvent.h"
 #include "core/frame/FrameView.h"
@@ skipping 368 matching lines @@
 {
     m_inCanceledStateForPointerTypeTouch = false;
 }
 
 WebInputEventResult PointerEventManager::handleTouchEvents(
     const PlatformTouchEvent& event)
 {
 
     if (event.type() == PlatformEvent::TouchScrollStarted) {
         blockTouchPointers();
+        m_touchEventManager.setTouchScrollStarted();
         return WebInputEventResult::HandledSystem;
     }
 
     bool newTouchSequence = true;
     for (const auto &touchPoint : event.touchPoints()) {
         if (touchPoint.state() != PlatformTouchPoint::TouchPressed) {
             newTouchSequence = false;
             break;
         }
     }
@@ skipping 378 matching lines @@
 {
     visitor->trace(m_frame);
     visitor->trace(m_nodeUnderPointer);
     visitor->trace(m_pointerCaptureTarget);
     visitor->trace(m_pendingPointerCaptureTarget);
     visitor->trace(m_touchEventManager);
 }
 
 
 } // namespace blink