Have setters use strict -> like methods

pkg/dev_compiler/test/codegen/language/abstract_method_test.dart

Index: pkg/dev_compiler/test/codegen/language/abstract_method_test.dart
diff --git a/pkg/dev_compiler/test/codegen/language/abstract_method_test.dart b/pkg/dev_compiler/test/codegen/language/abstract_method_test.dart
index cb52fcb799b9b128182e5d2bf99acba61c3fbf95..c2c52253ae85bac713fc94bcd159817234a23c62 100644
--- a/pkg/dev_compiler/test/codegen/language/abstract_method_test.dart
+++ b/pkg/dev_compiler/test/codegen/language/abstract_method_test.dart
@@ -12,7 +12,7 @@ width() { throw "error: top-level function called"; }
 
 abstract class A {
   int get length;     // Abstract instance getter.
-  set height(x);      // Abstract instance setter.
+  set height(int x);  // Abstract instance setter.
   int width();        // Abstract instance method.
 
   // Must resolve to non-abstract length getter in subclass.