Don't depend on unregisterProperty in register-property-syntax-parsing.html

third_party/WebKit/LayoutTests/custom-properties/register-property-syntax-parsing-expected.txt

Index: third_party/WebKit/LayoutTests/custom-properties/register-property-syntax-parsing-expected.txt
diff --git a/third_party/WebKit/LayoutTests/custom-properties/register-property-syntax-parsing-expected.txt b/third_party/WebKit/LayoutTests/custom-properties/register-property-syntax-parsing-expected.txt
index 19011ef33a6d1666a60adf46ee058c777850f08f..7923fbfc1752aa7b793fae5a4ec52210bc0fbd05 100644
--- a/third_party/WebKit/LayoutTests/custom-properties/register-property-syntax-parsing-expected.txt
+++ b/third_party/WebKit/LayoutTests/custom-properties/register-property-syntax-parsing-expected.txt
@@ -73,13 +73,13 @@ PASS syntax:'<length>++', initialValue:'10px' is invalid
 PASS syntax:'<length> | *', initialValue:'10px' is invalid 
 PASS syntax:'*|banana', initialValue:'banana' is invalid 
 PASS syntax:'*+', initialValue:'banana' is invalid 
-FAIL syntax:'initial', initialValue:'initial' is invalid assert_throws: function "() => CSS.registerProperty({name: '--syntax-test', syntax: syntax, initialValue: initialValue})" did not throw
-FAIL syntax:'<length>|initial', initialValue:'10px' is invalid assert_throws: function "() => CSS.registerProperty({name: '--syntax-test', syntax: syntax, initialValue: initialValue})" did not throw
-FAIL syntax:'<length>|INHERIT', initialValue:'10px' is invalid assert_throws: function "() => CSS.registerProperty({name: '--syntax-test', syntax: syntax, initialValue: initialValue})" did not throw
+FAIL syntax:'initial', initialValue:'initial' is invalid assert_throws: function "() => CSS.registerProperty({name: name, syntax: syntax, initialValue: initialValue})" did not throw
+FAIL syntax:'<length>|initial', initialValue:'10px' is invalid assert_throws: function "() => CSS.registerProperty({name: name, syntax: syntax, initialValue: initialValue})" did not throw
+FAIL syntax:'<length>|INHERIT', initialValue:'10px' is invalid assert_throws: function "() => CSS.registerProperty({name: name, syntax: syntax, initialValue: initialValue})" did not throw
 PASS syntax:'*', initialValue:'initial' is invalid 
 PASS syntax:'*', initialValue:'inherit' is invalid 
 PASS syntax:'*', initialValue:'unset' is invalid 
-FAIL syntax:'*', initialValue:'revert' is invalid assert_throws: function "() => CSS.registerProperty({name: '--syntax-test', syntax: syntax, initialValue: initialValue})" did not throw
+FAIL syntax:'*', initialValue:'revert' is invalid assert_throws: function "() => CSS.registerProperty({name: name, syntax: syntax, initialValue: initialValue})" did not throw
 PASS syntax:'<custom-ident>', initialValue:'initial' is invalid 
 PASS syntax:'<custom-ident>+', initialValue:'foo inherit bar' is invalid 
 PASS syntax:'*', initialValue:')' is invalid