Removed the non-const version of PropertyReference::value()

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 1203 matching lines @@
 
     // The property value, if it's a percentage, may not reflect the actual computed value.
     // For example: style="height: 1%; overflow: visible;" in quirksmode
     // FIXME: There are others like this, see <rdar://problem/5195123> Slashdot copy/paste fidelity problem
     CSSComputedStyleDeclaration* computedStyleForElement = CSSComputedStyleDeclaration::create(element);
     MutableStylePropertySet* fromComputedStyle = MutableStylePropertySet::create(HTMLQuirksMode);
     {
         unsigned propertyCount = m_mutableStyle->propertyCount();
         for (unsigned i = 0; i < propertyCount; ++i) {
             StylePropertySet::PropertyReference property = m_mutableStyle->propertyAt(i);
-            CSSValue* value = property.value();
+            const CSSValue* value = property.value();
             if (!value->isPrimitiveValue())
                 continue;
             if (toCSSPrimitiveValue(value)->isPercentage()) {
                 if (const CSSValue* computedPropertyValue = computedStyleForElement->getPropertyCSSValue(property.id()))
                     fromComputedStyle->addRespectingCascade(CSSProperty(property.id(), *computedPropertyValue));
             }
         }
     }
     m_mutableStyle->mergeAndOverrideOnConflict(fromComputedStyle);
 }
@@ skipping 522 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