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 a99076711aa7eb8cf65cc37ace0dcc7e05160779..52e994ece0bf8ae55fce783220676b5b3c8adb5c 100644
--- a/Source/core/css/parser/CSSPropertyParser.cpp
+++ b/Source/core/css/parser/CSSPropertyParser.cpp
@@ -225,6 +225,15 @@ 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;
     }