fuse List and js Array together and a few other misc fixes.

test/dart_codegen/expect/core/stopwatch.dart

Index: test/dart_codegen/expect/core/stopwatch.dart
diff --git a/test/dart_codegen/expect/core/stopwatch.dart b/test/dart_codegen/expect/core/stopwatch.dart
index 5e6f64326dd984c7a8101e41174dd37612c76944..f38fba919c7571b36ed79421196666f7e0165f1c 100644
--- a/test/dart_codegen/expect/core/stopwatch.dart
+++ b/test/dart_codegen/expect/core/stopwatch.dart
@@ -27,7 +27,7 @@ part of dart.core;
   if (_start == null) {
     return 0;
     }
-   return ((__x9) => DEVC$RT.cast(__x9, num, int, "ImplicitCast", """line 102, column 12 of dart:core/stopwatch.dart: """, __x9 is int, true))((_stop == null) ? (_now() - _start) : (_stop - _start));
+   return ((__x20) => DEVC$RT.cast(__x20, num, int, "ImplicitCast", """line 102, column 12 of dart:core/stopwatch.dart: """, __x20 is int, true))((_stop == null) ? (_now() - _start) : (_stop - _start));
   }
  Duration get elapsed {
   return new Duration(microseconds: elapsedMicroseconds);