Made StylePropertySet::getPropertyCSSValue return a const CSSValue*

third_party/WebKit/Source/core/editing/EditingStyle.cpp

 /*
  * Copyright (C) 2007, 2008, 2009 Apple Computer, Inc.
  * Copyright (C) 2010, 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1650 matching lines @@
     DCHECK(baseStyle);
     MutableStylePropertySet* result = styleWithRedundantProperties->mutableCopy();
 
     result->removeEquivalentProperties(baseStyle);
 
     const CSSValue* baseTextDecorationsInEffect = baseStyle->getPropertyCSSValueInternal(CSSPropertyWebkitTextDecorationsInEffect);
     diffTextDecorations(result, textDecorationPropertyForEditing(), baseTextDecorationsInEffect);
     diffTextDecorations(result, CSSPropertyWebkitTextDecorationsInEffect, baseTextDecorationsInEffect);
 
     if (const CSSValue* baseFontWeight = baseStyle->getPropertyCSSValueInternal(CSSPropertyFontWeight)) {
-        if (CSSValue* fontWeight = result->getPropertyCSSValue(CSSPropertyFontWeight)) {
+        if (const CSSValue* fontWeight = result->getPropertyCSSValue(CSSPropertyFontWeight)) {
             if (!fontWeightNeedsResolving(fontWeight) && !fontWeightNeedsResolving(baseFontWeight)
                 && (fontWeightIsBold(fontWeight) == fontWeightIsBold(baseFontWeight)))
                 result->removeProperty(CSSPropertyFontWeight);
         }
     }
 
     if (baseStyle->getPropertyCSSValueInternal(CSSPropertyColor) && getFontColor(result) == getFontColor(baseStyle))
         result->removeProperty(CSSPropertyColor);
 
     if (baseStyle->getPropertyCSSValueInternal(CSSPropertyTextAlign)
@@ skipping 75 matching lines @@
 {
     for (Node* ancestor = node; ancestor; ancestor = ancestor->parentNode()) {
         CSSComputedStyleDeclaration* ancestorStyle = CSSComputedStyleDeclaration::create(ancestor);
         if (!hasTransparentBackgroundColor(ancestorStyle))
             return ancestorStyle->getPropertyCSSValue(CSSPropertyBackgroundColor);
     }
     return nullptr;
 }
 
 } // namespace blink