Clean up dump-info and js_backend.

sdk/lib/_internal/compiler/implementation/js_backend/backend.dart

Index: sdk/lib/_internal/compiler/implementation/js_backend/backend.dart
diff --git a/sdk/lib/_internal/compiler/implementation/js_backend/backend.dart b/sdk/lib/_internal/compiler/implementation/js_backend/backend.dart
index 810eee3eb7e6122db5eec639e67f37a5728499bb..17d5eef71fbd724d4afaf2d9b2967ef1280f4310 100644
--- a/sdk/lib/_internal/compiler/implementation/js_backend/backend.dart
+++ b/sdk/lib/_internal/compiler/implementation/js_backend/backend.dart
@@ -943,9 +943,11 @@ class JavaScriptBackend extends Backend {
     enqueueClass(compiler.enqueuer.resolution, compiler.stringClass, registry);
   }
 
-  void enableNoSuchMethod(context, Enqueuer world) {
+  void enableNoSuchMethod(Element context, Enqueuer world) {
     enqueue(world, getCreateInvocationMirror(), compiler.globalDependencies);
     world.registerInvocation(compiler.noSuchMethodSelector);
+    // TODO(tyoverby): Send the context element to DumpInfoTask to be
+    // blamed.
   }
 
   void enableIsolateSupport(Enqueuer enqueuer) {