Fix println patch

Author: Mark-Simulacrum

collector/benchmarks/script-servo-2/0-println.patch

@@ -1,12 +1,11 @@
 diff --git a/components/script/dom/cssstyledeclaration.rs b/components/script/dom/cssstyledeclaration.rs
-index 2134e39..e4a5cb4 100644
 --- a/components/script/dom/cssstyledeclaration.rs
 +++ b/components/script/dom/cssstyledeclaration.rs
-@@ -311,6 +311,7 @@ impl CSSStyleDeclarationMethods for CSSStyleDeclaration {
- 
-     // https://dev.w3.org/csswg/cssom/#dom-cssstyledeclaration-getpropertypriority
-     fn GetPropertyPriority(&self, property: DOMString) -> DOMString {
+@@ -343,6 +343,7 @@ impl CSSStyleDeclarationMethods for CSSStyleDeclaration {
+
+     // https://dev.w3.org/csswg/cssom/#dom-cssstyledeclaration-getpropertyvalue
+     fn GetPropertyValue(&self, property: DOMString) -> DOMString {
 +        println!("{:?}", property);
-         let id = if let Ok(id) = PropertyId::parse(&property, None) {
-             id
-         } else {
+         let id = match PropertyId::parse_enabled_for_all_content(&property) {
+             Ok(id) => id,
+             Err(..) => return DOMString::new(),