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

third_party/WebKit/Source/core/frame/FrameSerializer.cpp

 /*
  * Copyright (C) 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:
  *
  *     * 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
@@ skipping 412 matching lines @@
 void FrameSerializer::retrieveResourcesForProperties(const StylePropertySet* styleDeclaration, Document& document)
 {
     if (!styleDeclaration)
         return;
 
     // The background-image and list-style-image (for ul or ol) are the CSS properties
     // that make use of images. We iterate to make sure we include any other
     // image properties there might be.
     unsigned propertyCount = styleDeclaration->propertyCount();
     for (unsigned i = 0; i < propertyCount; ++i) {
-        CSSValue* cssValue = styleDeclaration->propertyAt(i).value();
+        const CSSValue* cssValue = styleDeclaration->propertyAt(i).value();
         retrieveResourcesForCSSValue(*cssValue, document);
     }
 }
 
 void FrameSerializer::retrieveResourcesForCSSValue(const CSSValue& cssValue, Document& document)
 {
     if (cssValue.isImageValue()) {
         const CSSImageValue& imageValue = toCSSImageValue(cssValue);
         if (imageValue.isCachePending())
             return;
@@ skipping 32 matching lines @@
             continue;
         }
         emitsMinus = ch == '-';
         builder.append(ch);
     }
     CString escapedUrl = builder.toString().ascii();
     return String::format("saved from url=(%04d)%s", static_cast<int>(escapedUrl.length()), escapedUrl.data());
 }
 
 } // namespace blink