Drop down list closes on touch scroll/pinch zoom

third_party/WebKit/Source/web/WebPagePopupImpl.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 439 matching lines @@
 WebInputEventResult WebPagePopupImpl::handleCharEvent(
     const WebKeyboardEvent& event) {
   return handleKeyEvent(event);
 }
 
 WebInputEventResult WebPagePopupImpl::handleGestureEvent(
     const WebGestureEvent& event) {
   if (m_closing || !m_page || !m_page->mainFrame() ||
       !toLocalFrame(m_page->mainFrame())->view())
     return WebInputEventResult::NotHandled;
-  if (event.type == WebInputEvent::GestureTap &&
+  if ((event.type == WebInputEvent::GestureTap ||
+       event.type == WebInputEvent::GestureTapDown) &&
       !isViewportPointInWindow(event.x, event.y)) {
     cancel();
     return WebInputEventResult::NotHandled;
   }
   LocalFrame& frame = *toLocalFrame(m_page->mainFrame());
   return frame.eventHandler().handleGestureEvent(
       PlatformGestureEventBuilder(frame.view(), event));
 }
 
 void WebPagePopupImpl::handleMouseDown(LocalFrame& mainFrame,
@@ skipping 111 matching lines @@
   // A WebPagePopupImpl instance usually has two references.
   //  - One owned by the instance itself. It represents the visible widget.
   //  - One owned by a WebViewImpl. It's released when the WebViewImpl ask the
   //    WebPagePopupImpl to close.
   // We need them because the closing operation is asynchronous and the widget
   // can be closed while the WebViewImpl is unaware of it.
   return adoptRef(new WebPagePopupImpl(client)).leakRef();
 }
 
 }  // namespace blink