Add parseFontFaceDescriptor for @font-face handling

Source/core/css/parser/CSSParserImpl.cpp

Index: Source/core/css/parser/CSSParserImpl.cpp
diff --git a/Source/core/css/parser/CSSParserImpl.cpp b/Source/core/css/parser/CSSParserImpl.cpp
index 52b248d3fbc281ea58bc967f8aea583f1886de3e..b488d4936f8355d15f5c8e44147959cfb3f3c65d 100644
--- a/Source/core/css/parser/CSSParserImpl.cpp
+++ b/Source/core/css/parser/CSSParserImpl.cpp
@@ -465,18 +465,11 @@ PassRefPtrWillBeRawPtr<StyleRuleFontFace> CSSParserImpl::consumeFontFaceRule(CSS
 
     consumeDeclarationList(block, StyleRule::FontFace);
 
-    // FIXME: This logic should be in CSSPropertyParser
-    // FIXME: Shouldn't we fail if font-family or src aren't specified?
-    for (unsigned i = 0; i < m_parsedProperties.size(); ++i) {
-        CSSProperty& property = m_parsedProperties[i];
-        if (property.id() == CSSPropertyFontFamily && (!property.value()->isValueList() || toCSSValueList(property.value())->length() != 1)) {
-            m_parsedProperties.clear();
-            return nullptr;
-        }
-    }
-
     RefPtrWillBeRawPtr<StyleRuleFontFace> rule = StyleRuleFontFace::create();
-    rule->setProperties(createStylePropertySet(m_parsedProperties, m_context.mode()));
+    if (!rule->setProperties(createStylePropertySet(m_parsedProperties, m_context.mode()))) {
+        m_parsedProperties.clear();
+        return nullptr;
+    }
     m_parsedProperties.clear();
     if (m_styleSheet)
         m_styleSheet->setHasFontFaceRule(true);