Expand system font values during font property parsing

Source/core/css/resolver/StyleBuilderCustom.cpp

Index: Source/core/css/resolver/StyleBuilderCustom.cpp
diff --git a/Source/core/css/resolver/StyleBuilderCustom.cpp b/Source/core/css/resolver/StyleBuilderCustom.cpp
index 4594e7069ae5addbf3e61c03fecacf1aecbae8fd..04fdaee7be3d1816c7aa83bd935a37f04d8686d1 100644
--- a/Source/core/css/resolver/StyleBuilderCustom.cpp
+++ b/Source/core/css/resolver/StyleBuilderCustom.cpp
@@ -1295,18 +1295,6 @@ void StyleBuilder::oldApplyProperty(CSSPropertyID id, StyleResolverState& state,
         return;
     // Shorthand properties.
     case CSSPropertyFont:
-        // Only System Font identifiers should come through this method
-        // all other values should have been handled when the shorthand
-        // was expanded by the parser.
-        // FIXME: System Font identifiers should not hijack this
-        // short-hand CSSProperty like this.
-        ASSERT(!isInitial);
-        ASSERT(!isInherit);
-        ASSERT(primitiveValue);
-        state.style()->setLineHeight(RenderStyle::initialLineHeight());
-        state.setLineHeightValue(0);
-        state.fontBuilder().fromSystemFont(primitiveValue->getValueID(), state.style()->effectiveZoom());
-        return;
     case CSSPropertyAnimation:
     case CSSPropertyBackground:
     case CSSPropertyBackgroundPosition: