CSSValue Immediates: Replace CSSPrimitiveValue usage with const references

Source/core/editing/EditorCommand.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Igalia S.L.
  *
  * 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.
@@ skipping 123 matching lines @@
 
 // FIXME: executeToggleStyleInList does not handle complicated cases such as <b><u>hello</u>world</b> properly.
 //        This function must use Editor::selectionHasStyle to determine the current style but we cannot fix this
 //        until https://bugs.webkit.org/show_bug.cgi?id=27818 is resolved.
 static bool executeToggleStyleInList(LocalFrame& frame, EditorCommandSource source, EditAction action, CSSPropertyID propertyID, CSSValue value)
 {
     RefPtrWillBeRawPtr<EditingStyle> selectionStyle = EditingStyle::styleAtSelectionStart(frame.selection().selection());
     if (!selectionStyle || !selectionStyle->style())
         return false;
 
-    NullableCSSValue selectedCSSValue = selectionStyle->style()->getPropertyCSSValue(propertyID);
+    const NullableCSSValue& selectedCSSValue = selectionStyle->style()->getPropertyCSSValue(propertyID);
     String newStyle("none");
     if (selectedCSSValue && selectedCSSValue->isValueList()) {
         RefPtrWillBeRawPtr<CSSValueList> selectedCSSValueList = toCSSValueList(selectedCSSValue);
         if (!selectedCSSValueList->removeAll(value))
             selectedCSSValueList->append(value);
         if (selectedCSSValueList->length())
             newStyle = selectedCSSValueList->cssText();
 
     } else if (selectedCSSValue && selectedCSSValue->cssText() == "none") {
         newStyle = value.cssText();
@@ skipping 1633 matching lines @@
 {
     return m_command && m_command->isTextInsertion;
 }
 
 int Editor::Command::idForHistogram() const
 {
     return isSupported() ? m_command->idForUserMetrics : 0;
 }
 
 } // namespace blink