Change CSSToStyleMap functions to take const CSSValue&s

third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 59 matching lines @@
     if (value->isPrimitiveValue()) {
         ASSERT(toCSSPrimitiveValue(value)->getValueID() == CSSValueNone);
         return ComputedStyle::initialBoxReflect();
     }
 
     CSSReflectValue* reflectValue = toCSSReflectValue(value);
     RefPtr<StyleReflection> reflection = StyleReflection::create();
     reflection->setDirection(*reflectValue->direction());
     if (reflectValue->offset())
         reflection->setOffset(reflectValue->offset()->convertToLength(state.cssToLengthConversionData()));
-    NinePieceImage mask;
-    mask.setMaskDefaults();
-    CSSToStyleMap::mapNinePieceImage(state, CSSPropertyWebkitBoxReflect, reflectValue->mask(), mask);
-    reflection->setMask(mask);
+    if (reflectValue->mask()) {
+        NinePieceImage mask;
+        mask.setMaskDefaults();
+        CSSToStyleMap::mapNinePieceImage(state, CSSPropertyWebkitBoxReflect, *reflectValue->mask(), mask);
+        reflection->setMask(mask);
+    }
 
     return reflection.release();
 }
 
 Color StyleBuilderConverter::convertColor(StyleResolverState& state, CSSValue* value, bool forVisitedLink)
 {
     CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
     return state.document().textLinkColors().colorFromPrimitiveValue(primitiveValue, state.style()->color(), forVisitedLink);
 }
 
@@ skipping 874 matching lines @@
     return ScaleTransformOperation::create(sx, sy, sz, TransformOperation::Scale3D);
 }
 
 RespectImageOrientationEnum StyleBuilderConverter::convertImageOrientation(StyleResolverState& state, CSSValue* value)
 {
     CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value);
     return primitiveValue->getValueID() == CSSValueFromImage ? RespectImageOrientation : DoNotRespectImageOrientation;
 }
 
 } // namespace blink