Use short array syntax in method signatures

test/codegen/expect/sunflower/sunflower.js

Index: test/codegen/expect/sunflower/sunflower.js
diff --git a/test/codegen/expect/sunflower/sunflower.js b/test/codegen/expect/sunflower/sunflower.js
index 02b90c0ea686a87792a56e5a8f31b150b28ae74f..e9ff3b0027cbf7d4ec19fb6f4236469aa96ad4c4 100644
--- a/test/codegen/expect/sunflower/sunflower.js
+++ b/test/codegen/expect/sunflower/sunflower.js
@@ -72,7 +72,7 @@ var core = dart.import(core);
   }
   CirclePainter[dart.implements] = () => [Circle];
   dart.setSignature(CirclePainter, {
-    methods: () => ({draw: dart.functionType(dart.void, [])})
+    methods: () => ({draw: [dart.void, []]})
   });
   class SunflowerSeed extends dart.mixin(Circle, CirclePainter) {
     SunflowerSeed(x, y, radius, color) {