Resolve class element of Object, even if no objects are used.

frog/leg/ssa/closure.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class ClosureFieldElement extends Element {
   ClosureFieldElement(SourceString name, ClassElement enclosing)
       : super(name, ElementKind.FIELD, enclosing);
 
   bool isInstanceMember() => true;
   bool isAssignable() => false;
@@ skipping 280 matching lines @@
     SourceString name = const SourceString("Closure");
     CompilationUnitElement compilationUnit = element.getCompilationUnit();
     ClassElement globalizedElement = new ClassElement(name, compilationUnit);
     FunctionElement callElement =
         new FunctionElement.from(Namer.CLOSURE_INVOCATION_NAME,
                                  element,
                                  globalizedElement);
     globalizedElement.backendMembers =
         const EmptyLink<Element>().prepend(callElement);
     globalizedElement.isResolved = true;
-    ClassElement objectClass =
-        compiler.coreLibrary.find(const SourceString('Object'));
-    globalizedElement.supertype = new SimpleType(Types.OBJECT, objectClass);
+    // TODO(karlklose): create function to get the resolved class object.
+    ClassElement objectClass = compiler.coreLibrary.find(Types.OBJECT);
+    globalizedElement.supertype = objectClass.computeType(compiler);
+    objectClass.resolve(compiler);
     // The nested function's 'this' is the same as the one for the outer
     // function. It could be [null] if we are inside a static method.
     Element thisElement = closureData.thisElement;
     return new ClosureData(element, globalizedElement,
                            callElement, thisElement);
   }
 
   visitFunctionExpression(FunctionExpression node) {
     FunctionElement element = elements[node];
     bool isClosure = (closureData !== null);
@@ skipping 73 matching lines @@
     }
   }
 
   visitTryStatement(TryStatement node) {
     // TODO(ngeoffray): implement finer grain state.
     inTryCatchOrFinally = true;
     node.visitChildren(this);
     inTryCatchOrFinally = false;
   }
 }