Delete remaining masks dead code.

sky/engine/core/css/resolver/CSSToStyleMap.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 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 238 matching lines @@
     if (pair)
         primitiveValue = pair->second();
 
     Length length = primitiveValue->convertToLength<FixedConversion | PercentConversion>(cssToLengthConversionData());
 
     layer->setYPosition(length);
     if (pair)
         layer->setBackgroundYOrigin(*(pair->first()));
 }
 
-void CSSToStyleMap::mapFillMaskSourceType(FillLayer* layer, CSSValue* value) const
-{
-    EMaskSourceType type = FillLayer::initialFillMaskSourceType(layer->type());
-    if (value->isInitialValue()) {
-        layer->setMaskSourceType(type);
-        return;
-    }
-
-    if (!value->isPrimitiveValue())
-        return;
-
-    switch (toCSSPrimitiveValue(value)->getValueID()) {
-    case CSSValueAlpha:
-        type = MaskAlpha;
-        break;
-    case CSSValueLuminance:
-        type = MaskLuminance;
-        break;
-    case CSSValueAuto:
-        break;
-    default:
-        ASSERT_NOT_REACHED();
-    }
-
-    layer->setMaskSourceType(type);
-}
-
 double CSSToStyleMap::mapAnimationDelay(CSSValue* value)
 {
     if (value->isInitialValue())
         return CSSTimingData::initialDelay();
     return toCSSPrimitiveValue(value)->computeSeconds();
 }
 
 Timing::PlaybackDirection CSSToStyleMap::mapAnimationDirection(CSSValue* value)
 {
     if (value->isInitialValue())
@@ skipping 292 matching lines @@
         verticalRule = SpaceImageRule;
         break;
     default: // CSSValueRepeat
         verticalRule = RepeatImageRule;
         break;
     }
     image.setVerticalRule(verticalRule);
 }
 
 };