CSS: Use count unitless 0 supplied as <angle>

third_party/WebKit/Source/core/css/parser/CSSPropertyParserHelpers.h

Index: third_party/WebKit/Source/core/css/parser/CSSPropertyParserHelpers.h
diff --git a/third_party/WebKit/Source/core/css/parser/CSSPropertyParserHelpers.h b/third_party/WebKit/Source/core/css/parser/CSSPropertyParserHelpers.h
index e1f2a5f6a246ddc69af242a03f058341d0602292..bb38a8c6c6980a409296a2c9ab858510344c3fa6 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSPropertyParserHelpers.h
+++ b/third_party/WebKit/Source/core/css/parser/CSSPropertyParserHelpers.h
@@ -11,6 +11,7 @@
 #include "core/css/CSSValueList.h"
 #include "core/css/parser/CSSParserMode.h"
 #include "core/css/parser/CSSParserTokenRange.h"
+#include "core/frame/UseCounter.h"
 #include "platform/Length.h"  // For ValueRange
 #include "platform/heap/Handle.h"
 
@@ -53,7 +54,14 @@ CSSPrimitiveValue* ConsumeLengthOrPercent(
     CSSParserMode,
     ValueRange,
     UnitlessQuirk = UnitlessQuirk::kForbid);
-CSSPrimitiveValue* ConsumeAngle(CSSParserTokenRange&);
+
+// Pass UnitlessQuirk::kForbid and
+// UseCounter::Feature::kNumberOfFeatures if
+// literal 0 angles are not supported.
+CSSPrimitiveValue* ConsumeAngle(CSSParserTokenRange&,
+                                const CSSParserContext&,
+                                UnitlessQuirk,
+                                UseCounter::Feature literalZero);
 CSSPrimitiveValue* ConsumeTime(CSSParserTokenRange&, ValueRange);
 CSSPrimitiveValue* ConsumeResolution(CSSParserTokenRange&);