Remove unused API.

dart/sdk/lib/_internal/compiler/implementation/elements/modelx.dart

 // Copyright (c) 2013, 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.modelx;
 
 import 'elements.dart';
 import '../../compiler.dart' as api;
 import '../tree/tree.dart';
 import '../util/util.dart';
@@ skipping 269 matching lines @@
   void setNative(String name) {
     _isNative = true;
     _fixedBackendName = name;
   }
   void setFixedBackendName(String name) {
     _fixedBackendName = name;
   }
 
   FunctionElement asFunctionElement() => null;
 
-  static bool isInvalid(Element e) => e == null || e.isErroneous();
-
   bool get isAbstract => modifiers.isAbstract();
   bool isForeign(Compiler compiler) => getLibrary() == compiler.foreignLibrary;
 
   FunctionElement get targetConstructor => null;
 
   void diagnose(Element context, DiagnosticListener listener) {}
 }
 
 /**
  * Represents an unresolvable or duplicated element.
@@ skipping 1563 matching lines @@
       if (isPrivate && !identical(library, s.getLibrary())) continue;
       Element e = s.lookupLocalMember(memberName);
       if (e == null) continue;
       // Static members are not inherited.
       if (e.modifiers.isStatic()) continue;
       return e;
     }
     return null;
   }
 
-  Element lookupSuperInterfaceMember(String memberName,
-                                     LibraryElement fromLibrary) {
-    bool isPrivate = isPrivateName(memberName);
-    for (InterfaceType t in interfaces) {
-      ClassElement cls = t.element;
-      Element e = cls.lookupLocalMember(memberName);
-      if (e == null) continue;
-      // Private members from a different library are not visible.
-      if (isPrivate && !identical(fromLibrary, 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 [selector].
    *
    * 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.
    *
    * When called on the implementation element both members declared in the
    * origin and the patch class are returned.
    */
@@ skipping 100 matching lines @@
   }
 
   // TODO(aprelev@gmail.com): Peter believes that it would be great to
   // make noMatch a required argument. Peter's suspicion is that most
   // callers of this method would benefit from using the noMatch method.
   Element lookupConstructor(Selector selector, [Element noMatch(Element)]) {
     Element result = localLookup(selector.name);
     return validateConstructorLookupResults(selector, result, noMatch);
   }
 
-  Element lookupFactoryConstructor(Selector selector,
-                                   [Element noMatch(Element)]) {
-    String constructorName = selector.name;
-    Element result = localLookup(constructorName);
-    return validateConstructorLookupResults(selector, result, noMatch);
-  }
-
   Link<Element> get constructors {
     // TODO(ajohnsen): See if we can avoid this method at some point.
     Link<Element> result = const Link<Element>();
     // TODO(johnniwinther): Should we include injected constructors?
     forEachMember((_, Element member) {
       if (member.isConstructor()) result = result.prepend(member);
     });
     return result;
   }
 
@@ skipping 406 matching lines @@
 
   MetadataAnnotation ensureResolved(Compiler compiler) {
     if (resolutionState == STATE_NOT_STARTED) {
       compiler.resolver.resolveMetadataAnnotation(this);
     }
     return this;
   }
 
   String toString() => 'MetadataAnnotation($value, $resolutionState)';
 }