Fix benchmarks to comply with rust-lang/rust#65846

Author: Mark-Simulacrum

collector/benchmarks/script-servo/components/style/stylesheets/viewport_rule.rs

@@ -287,10 +287,10 @@ impl<'a, 'b, 'i> DeclarationParser<'i> for ViewportRuleParser<'a, 'b> {
                        -> Result<Vec<ViewportDescriptorDeclaration>, ParseError<'i>> {
         macro_rules! declaration {
             ($declaration:ident($parse:expr)) => {
-                declaration!($declaration(value: try!($parse(input)),
-                                          important: input.try(parse_important).is_ok()))
+                declaration!($declaration(value@ try!($parse(input)),
+                                          important@ input.try(parse_important).is_ok()))
             };
-            ($declaration:ident(value: $value:expr, important: $important:expr)) => {
+            ($declaration:ident(value@ $value:expr, important@ $important:expr)) => {
                 ViewportDescriptorDeclaration::new(
                     self.context.stylesheet_origin,
                     ViewportDescriptor::$declaration($value),
@@ -306,8 +306,8 @@ impl<'a, 'b, 'i> DeclarationParser<'i> for ViewportRuleParser<'a, 'b> {
                 let shorthand = parse_shorthand(self.context, input)?;
                 let important = input.try(parse_important).is_ok();
 
-                Ok(vec![declaration!($min(value: shorthand.0, important: important)),
-                        declaration!($max(value: shorthand.1, important: important))])
+                Ok(vec![declaration!($min(value@ shorthand.0, important@ important)),
+                        declaration!($max(value@ shorthand.1, important@ important))])
             }}
         }
 

collector/benchmarks/style-servo/components/style/stylesheets/viewport_rule.rs

@@ -287,10 +287,10 @@ impl<'a, 'b, 'i> DeclarationParser<'i> for ViewportRuleParser<'a, 'b> {
                        -> Result<Vec<ViewportDescriptorDeclaration>, ParseError<'i>> {
         macro_rules! declaration {
             ($declaration:ident($parse:expr)) => {
-                declaration!($declaration(value: try!($parse(input)),
-                                          important: input.try(parse_important).is_ok()))
+                declaration!($declaration(value@ try!($parse(input)),
+                                          important@ input.try(parse_important).is_ok()))
             };
-            ($declaration:ident(value: $value:expr, important: $important:expr)) => {
+            ($declaration:ident(value@ $value:expr, important@ $important:expr)) => {
                 ViewportDescriptorDeclaration::new(
                     self.context.stylesheet_origin,
                     ViewportDescriptor::$declaration($value),
@@ -306,8 +306,8 @@ impl<'a, 'b, 'i> DeclarationParser<'i> for ViewportRuleParser<'a, 'b> {
                 let shorthand = parse_shorthand(self.context, input)?;
                 let important = input.try(parse_important).is_ok();
 
-                Ok(vec![declaration!($min(value: shorthand.0, important: important)),
-                        declaration!($max(value: shorthand.1, important: important))])
+                Ok(vec![declaration!($min(value@ shorthand.0, important@ important)),
+                        declaration!($max(value@ shorthand.1, important@ important))])
             }}
         }