Keep writing-mode in sync between a column spanner and its placeholder.

third_party/WebKit/Source/core/layout/LayoutObject.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 1462 matching lines @@
     virtual bool isOfType(LayoutObjectType type) const { return false; }
 
     inline bool layerCreationAllowedForSubtree() const;
 
     // Overrides should call the superclass at the end. m_style will be 0 the first time
     // this function will be called.
     virtual void styleWillChange(StyleDifference, const ComputedStyle& newStyle);
     // Overrides should call the superclass at the start. |oldStyle| will be 0 the first
     // time this function is called.
     virtual void styleDidChange(StyleDifference, const ComputedStyle* oldStyle);
-    void propagateStyleToAnonymousChildren(bool blockChildrenOnly = false);
+    void propagateStyleToAnonymousChildren();
+    // Return true for objects that don't want style changes automatically propagated via
+    // propagateStyleToAnonymousChildren(), but rather rely on other custom mechanisms (if they
+    // need to be notified of parent style changes at all).
+    virtual bool anonymousHasStylePropagationOverride() { return false; }
 
 protected:
     // This function is called before calling the destructor so that some clean-up
     // can happen regardless of whether they call a virtual function or not. As a
     // rule of thumb, this function should be preferred to the destructor. See
     // destroy() that is the one calling willBeDestroyed().
     //
     // There are 2 types of destructions: regular destructions and tree tear-down.
     // Regular destructions happen when the renderer is not needed anymore (e.g.
     // 'display' changed or the DOM Node was removed).
@@ skipping 680 matching lines @@
 void showTree(const blink::LayoutObject*);
 void showLineTree(const blink::LayoutObject*);
 void showLayoutTree(const blink::LayoutObject* object1);
 // We don't make object2 an optional parameter so that showLayoutTree
 // can be called from gdb easily.
 void showLayoutTree(const blink::LayoutObject* object1, const blink::LayoutObject* object2);
 
 #endif
 
 #endif // LayoutObject_h