calc expressions should support time, angle and frequency values.

Source/core/css/parser/CSSPropertyParser.cpp

Index: Source/core/css/parser/CSSPropertyParser.cpp
diff --git a/Source/core/css/parser/CSSPropertyParser.cpp b/Source/core/css/parser/CSSPropertyParser.cpp
index e6a9a176492a63858ccf2da9e95363fca5489e67..8cc6e8b045fd441637aed5801a6c2ef2f35a2ed3 100644
--- a/Source/core/css/parser/CSSPropertyParser.cpp
+++ b/Source/core/css/parser/CSSPropertyParser.cpp
@@ -218,6 +218,15 @@ bool CSSPropertyParser::validCalculationUnit(CSSParserValue* value, Units unitfl
     case CalcPercentNumber:
         b = (unitflags & FPercent) && (unitflags & FNumber);
         break;
+    case CalcAngle:
+        b = (unitflags & FAngle);
+        break;
+    case CalcTime:
+        b = (unitflags & FTime);
+        break;
+    case CalcFrequency:
+        b = (unitflags & FFrequency);
+        break;
     case CalcOther:
         break;
     }