Avoid double layout for writing mode roots if LayoutNG is enabled

third_party/WebKit/Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 1074 matching lines @@
       layoutFromRootObject(*root);
 
       // We need to ensure that we mark up all layoutObjects up to the
       // LayoutView for paint invalidation. This simplifies our code as we just
       // always do a full tree walk.
       if (LayoutItem container = LayoutItem(root->container()))
         container.setMayNeedPaintInvalidation();
     }
     m_layoutSubtreeRootList.clear();
   } else {
-    if (hasOrthogonalWritingModeRoots())
+    if (hasOrthogonalWritingModeRoots() &&
+        !RuntimeEnabledFeatures::layoutNGEnabled())
       layoutOrthogonalWritingModeRoots();
     layoutFromRootObject(*layoutView());
   }
 
   m_frame->document()->fetcher()->updateAllImageResourcePriorities();
 
   lifecycle().advanceTo(DocumentLifecycle::AfterPerformLayout);
 
   TRACE_EVENT_END1(PERFORM_LAYOUT_TRACE_CATEGORIES, "FrameView::performLayout",
                    "counters", analyzerCounters());
@@ skipping 3955 matching lines @@
     std::unique_ptr<CompositorAnimationTimeline> timeline) {
   m_animationTimeline = std::move(timeline);
 }
 
 void FrameView::setAnimationHost(
     std::unique_ptr<CompositorAnimationHost> host) {
   m_animationHost = std::move(host);
 }
 
 }  // namespace blink