support function in custom paint input arguments

third_party/WebKit/Source/core/css/parser/CSSPropertyParserTest.cpp

Index: third_party/WebKit/Source/core/css/parser/CSSPropertyParserTest.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/CSSPropertyParserTest.cpp b/third_party/WebKit/Source/core/css/parser/CSSPropertyParserTest.cpp
index 5c636e95a18962ed8ba890f946ecb8198ac5f329..6bf56faba63ae82a639950422af115caeeeb979a 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSPropertyParserTest.cpp
+++ b/third_party/WebKit/Source/core/css/parser/CSSPropertyParserTest.cpp
@@ -20,6 +20,14 @@ static int computeNumberOfTracks(const CSSValueList* valueList) {
   return numberOfTracks;
 }
 
+TEST(CSSPropertyParserTest, CSSPaint_Functions) {
+  const CSSValue* value = CSSParser::parseSingleValue(
+      CSSPropertyBackgroundImage, "paint(foo, func1(1px, 3px), red)");
+  ASSERT_TRUE(value);
+  ASSERT_TRUE(value->isImageGeneratorValue());
+  EXPECT_EQ(value->cssText(), "paint(foo, func1(1px, 3px), red)");
+}
+
 TEST(CSSPropertyParserTest, CSSPaint_NoArguments) {
   const CSSValue* value =
       CSSParser::parseSingleValue(CSSPropertyBackgroundImage, "paint(foo)");