Move font-family check to CSSPropertyParser

Source/core/css/parser/CSSPropertyParser.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
@@ skipping 4597 matching lines @@
             value = m_valueList->next();
             familyBuilder.commit();
             inFamily = false;
         }
         else if (nextValIsFontName)
             value = nextValue;
         else
             break;
     }
     familyBuilder.commit();
-
-    if (!list->length())
+    if (!list->length() || (m_ruleType == StyleRule::FontFace && list->length() > 1))
         list = nullptr;
     return list.release();
 }
 
 bool CSSPropertyParser::parseLineHeight(bool important)
 {
     CSSParserValue* value = m_valueList->current();
     CSSValueID id = value->id;
     bool validPrimitive = false;
     // normal | <number> | <length> | <percentage> | inherit
@@ skipping 3794 matching lines @@
         }
     }
 
     if (!list->length())
         return nullptr;
 
     return list.release();
 }
 
 } // namespace blink