CSS Transforms: Implement transform-style

Source/core/css/resolver/StyleAdjuster.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 149 matching lines @@
 {
     return isDisplayFlexibleBox(parentStyle->display()) || isDisplayGridBox(parentStyle->display());
 }
 
 static bool hasWillChangeThatCreatesStackingContext(const RenderStyle* style, Element* e)
 {
     for (size_t i = 0; i < style->willChangeProperties().size(); ++i) {
         switch (style->willChangeProperties()[i]) {
         case CSSPropertyOpacity:
         case CSSPropertyWebkitTransform:
+        case CSSPropertyTransformStyle:
         case CSSPropertyWebkitTransformStyle:
         case CSSPropertyWebkitPerspective:
         case CSSPropertyWebkitMask:
         case CSSPropertyWebkitMaskBoxImage:
         case CSSPropertyWebkitClipPath:
         case CSSPropertyWebkitBoxReflect:
         case CSSPropertyWebkitFilter:
         case CSSPropertyZIndex:
         case CSSPropertyPosition:
             return true;
@@ skipping 259 matching lines @@
     if (style->writingMode() != TopToBottomWritingMode && (style->display() == BOX || style->display() == INLINE_BOX))
         style->setWritingMode(TopToBottomWritingMode);
 
     if (isDisplayFlexibleBox(parentStyle->display()) || isDisplayGridBox(parentStyle->display())) {
         style->setFloating(NoFloat);
         style->setDisplay(equivalentBlockDisplay(style->display(), style->isFloating(), !m_useQuirksModeStyles));
     }
 }
 
 }