fix for static methods and names banned in strict mode

test/codegen/expect/DeltaBlue.js

Index: test/codegen/expect/DeltaBlue.js
diff --git a/test/codegen/expect/DeltaBlue.js b/test/codegen/expect/DeltaBlue.js
index 9d0693b81b0f252784492243e081a43566037452..084e0a8cff17bdba330829291eafd96ceb1e15a4 100644
--- a/test/codegen/expect/DeltaBlue.js
+++ b/test/codegen/expect/DeltaBlue.js
@@ -29,10 +29,10 @@ var DeltaBlue;
       return dart.notNull(s1.value) > dart.notNull(s2.value);
     }
     static weakest(s1, s2) {
-      return weaker(s1, s2) ? s1 : s2;
+      return Strength.weaker(s1, s2) ? s1 : s2;
     }
     static strongest(s1, s2) {
-      return stronger(s1, s2) ? s1 : s2;
+      return Strength.stronger(s1, s2) ? s1 : s2;
     }
   }
   let REQUIRED = new Strength(0, "required");