Delete remaining masks dead code.

sky/engine/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 131 matching lines @@
         else
             style->setDisplay(equivalentInlineDisplay(style->display()));
     }
 
     // Make sure our z-index value is only applied if the object is positioned.
     if (style->position() == StaticPosition && !parentStyleForcesZIndexToCreateStackingContext(parentStyle))
         style->setHasAutoZIndex();
 
     // Auto z-index becomes 0 for the root element and transparent objects. This prevents
     // cases where objects that should be blended as a single unit end up with a non-transparent
-    // object wedged in between them. Auto z-index also becomes 0 for objects that specify transforms/masks/reflections.
+    // object wedged in between them. Auto z-index also becomes 0 for objects that specify transforms.
     if (style->hasAutoZIndex() && ((element.document().documentElement() == element)
         || style->hasOpacity()
         || style->hasTransformRelatedProperty()
-        || style->hasMask()
         || style->clipPath()
         || style->hasFilter()
         || hasWillChangeThatCreatesStackingContext(style)))
         style->setZIndex(0);
 
     // will-change:transform should result in the same rendering behavior as having a transform,
     // including the creation of a containing block for fixed position descendants.
     if (!style->hasTransform() && (style->willChangeProperties().contains(CSSPropertyWebkitTransform) || style->willChangeProperties().contains(CSSPropertyTransform))) {
         bool makeIdentity = true;
         style->setTransform(TransformOperations(makeIdentity));
     }
 
     if (doesNotInheritTextDecoration(style, element))
         style->clearAppliedTextDecorations();
 
     style->applyTextDecorations();
 
     if (style->overflowX() != OVISIBLE || style->overflowY() != OVISIBLE)
         adjustOverflow(style);
 
     // Cull out any useless layers and also repeat patterns into additional layers.
     style->adjustBackgroundLayers();
-    style->adjustMaskLayers();
 
     // If we have transitions, or animations, do not share this style.
     if (style->transitions() || style->animations())
         style->setUnique();
 
     // FIXME: when dropping the -webkit prefix on transform-style, we should also have opacity < 1 cause flattening.
     if (style->preserves3D() && (style->overflowX() != OVISIBLE
         || style->overflowY() != OVISIBLE
         || style->hasFilter()))
         style->setTransformStyle3D(TransformStyle3DFlat);
@@ skipping 62 matching lines @@
         // FIXME: Once we implement pagination controls, overflow-x should default to hidden
         // if overflow-y is set to -webkit-paged-x or -webkit-page-y. For now, we'll let it
         // default to auto so we can at least scroll through the pages.
         style->setOverflowX(OAUTO);
     } else if (style->overflowY() == OVISIBLE && style->overflowX() != OVISIBLE) {
         style->setOverflowY(OAUTO);
     }
 }
 
 }