Split up CSSPrimitiveValue::isString into isString and isCustomIdent

Source/core/css/FontFace.cpp

 /*
  * Copyright (C) 2013 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 260 matching lines @@
 }
 
 bool FontFace::setFamilyValue(CSSValueList* familyList)
 {
     // The font-family descriptor has to have exactly one family name.
     if (familyList->length() != 1)
         return false;
 
     CSSPrimitiveValue* familyValue = toCSSPrimitiveValue(familyList->item(0));
     AtomicString family;
-    if (familyValue->isString()) {
+    if (familyValue->isCustomIdent()) {
         family = AtomicString(familyValue->getStringValue());
     } else if (familyValue->isValueID()) {
         // We need to use the raw text for all the generic family types, since @font-face is a way of actually
         // defining what font to use for those types.
         switch (familyValue->getValueID()) {
         case CSSValueSerif:
             family =  FontFamilyNames::webkit_serif;
             break;
         case CSSValueSansSerif:
             family =  FontFamilyNames::webkit_sans_serif;
@@ skipping 288 matching lines @@
 {
     return m_cssFontFace->hadBlankText();
 }
 
 bool FontFace::hasPendingActivity() const
 {
     return m_status == Loading && executionContext() && !executionContext()->activeDOMObjectsAreStopped();
 }
 
 } // namespace blink