Ensure interfaces are loaded.

dart/lib/compiler/implementation/compiler.dart

Index: dart/lib/compiler/implementation/compiler.dart
diff --git a/dart/lib/compiler/implementation/compiler.dart b/dart/lib/compiler/implementation/compiler.dart
index 097a3eab6d2fb6624aa111271604944ae7ccf199..57345d90d3de98030794ea5eb481f84d26980c3b 100644
--- a/dart/lib/compiler/implementation/compiler.dart
+++ b/dart/lib/compiler/implementation/compiler.dart
@@ -920,10 +920,6 @@ class Compiler implements DiagnosticListener {
     enqueuer.codegen.registerInstantiatedClass(cls);
   }
 
-  void resolveClass(ClassElement element) {
-    withCurrentElement(element, () => resolver.resolveClass(element));
-  }
-
   Type resolveTypeAnnotation(Element element, TypeAnnotation annotation) {
     return resolver.resolveTypeAnnotation(element, annotation);
   }