Disable compositing asserts when gesture scrolling on main thread

third_party/WebKit/Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 580 matching lines @@
     // other, this bookkeeping remains accurate.
     scrollState.setCurrentNativeScrollingElement(this);
     if (scrollState.fromUserInput()) {
         if (DocumentLoader* documentLoader = document().loader())
             documentLoader->initialScrollState().wasScrolledByUser = true;
     }
 };
 
 void Element::callApplyScroll(ScrollState& scrollState)
 {
+    // Hits ASSERTs when trying to determine whether we need to scroll on main
+    // or CC. http://crbug.com/625676.
+    DisableCompositingQueryAsserts disabler;
+
     ScrollStateCallback* callback = scrollCustomizationCallbacks().getApplyScroll(this);
 
     // TODO(bokan): Need to add tests before we allow calling custom callbacks
     // for non-touch modalities. For now, just call into the native callback but
     // allow the viewport scroll callback so we don't disable overscroll.
     // crbug.com/623079.
     bool disableCustomCallbacks = !scrollState.isDirectManipulation()
         && !document().isViewportScrollCallback(callback);
 
     if (!callback || disableCustomCallbacks) {
@@ skipping 3119 matching lines @@
 
 DEFINE_TRACE_WRAPPERS(Element)
 {
     if (hasRareData()) {
         visitor->traceWrappers(elementRareData());
     }
     ContainerNode::traceWrappers(visitor);
 }
 
 } // namespace blink