Implement override checks.

dart/lib/compiler/implementation/elements/elements.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.
 
 #library('elements');
 
 #import('../tree/tree.dart');
 #import('../scanner/scannerlib.dart');
 #import('../leg.dart');  // TODO(karlklose): we only need type.
 #import('../util/util.dart');
@@ skipping 196 matching lines @@
       String holderName = enclosingElement.name.slowToString();
       return '$kind($holderName#${name.slowToString()})';
     } else {
       return '$kind(${name.slowToString()})';
     }
   }
 
   bool _isNative = false;
   void setNative() { _isNative = true; }
   bool isNative() => _isNative;
+
+  FunctionElement asFunctionElement() => null;
 }
 
 class ContainerElement extends Element {
   ContainerElement(name, kind, enclosingElement) :
     super(name, kind, enclosingElement);
 
   abstract void addMember(Element element, DiagnosticListener listener);
 
   void addGetterOrSetter(Element element,
                          Element existing,
@@ skipping 406 matching lines @@
 
   FunctionType computeType(Compiler compiler) {
     if (type != null) return type;
     type = compiler.computeFunctionType(this, computeSignature(compiler));
     return type;
   }
 
   Node parseNode(DiagnosticListener listener) => cachedNode;
 
   Token position() => cachedNode.getBeginToken();
+
+  FunctionElement asFunctionElement() => this;
 }
 
 class ConstructorBodyElement extends FunctionElement {
   FunctionElement constructor;
 
   ConstructorBodyElement(FunctionElement constructor)
       : this.constructor = constructor,
         super(constructor.name,
               ElementKind.GENERATIVE_CONSTRUCTOR_BODY,
               null,
@@ skipping 94 matching lines @@
     return result;
   }
 
   Element lookupLocalMember(SourceString memberName) {
     return localMembers[memberName];
   }
 
   Element lookupSuperMember(SourceString memberName) {
     for (ClassElement s = superclass; s != null; s = s.superclass) {
       Element e = s.lookupLocalMember(memberName);
-      if (e !== null) {
-        if (!memberName.isPrivate() || getLibrary() === e.getLibrary()) {
-          return e;
-        }
-      }
+      if (e === null) continue;
+      // Private members from a different library are not visible.
+      if (memberName.isPrivate() && getLibrary() !== e.getLibrary()) continue;
+      // Static members are not inherited.
+      if (e.modifiers.isStatic()) continue;
+      return e;
     }
     return null;
   }
 
   /**
    * Find the first member in the class chain with the given
    * [memberName]. This method is NOT to be used for resolving
    * unqualified sends because it does not implement the scoping
    * rules, where library scope comes before superclass scope.
    */
@@ skipping 287 matching lines @@
   final Node node;
   Type bound;
   Type type;
   TypeVariableElement(name, Element enclosing, this.node, this.type,
                       [this.bound])
     : super(name, ElementKind.TYPE_VARIABLE, enclosing);
   Type computeType(compiler) => type;
   Node parseNode(compiler) => node;
   toString() => "${enclosingElement.toString()}.${name.slowToString()}";
 }