Rename Type to DartType to avoid conflicts with the class Type in the core library.

lib/compiler/implementation/world.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 World {
   Compiler compiler;  // Set in populate().
   final Map<ClassElement, Set<ClassElement>> subtypes;
 
   World() : subtypes = new Map<ClassElement, Set<ClassElement>>();
 
   void populate(Compiler compiler) {
     void addSubtypes(ClassElement cls) {
       if (cls.resolutionState != STATE_DONE) {
         compiler.internalErrorOnElement(
             cls, 'Class "${cls.name.slowToString()}" is not resolved.');
       }
-      for (Type type in cls.allSupertypes) {
+      for (DartType type in cls.allSupertypes) {
         Set<Element> subtypesOfCls =
           subtypes.putIfAbsent(type.element, () => new Set<ClassElement>());
         subtypesOfCls.add(cls);
       }
     }
 
     compiler.resolverWorld.instantiatedClasses.forEach(addSubtypes);
 
     // Mark the world as populated.
     assert(compiler !== null);
     this.compiler = compiler;
   }
 
   /**
    * Returns a [MemberSet] that contains the possible targets of the given
    * [selector] on a receiver with the given [type]. This includes all sub
    * types.
    */
-  MemberSet _memberSetFor(Type type, Selector selector) {
+  MemberSet _memberSetFor(DartType type, Selector selector) {
     assert(compiler !== null);
     ClassElement cls = type.element;
     SourceString name = selector.name;
     LibraryElement library = selector.library;
     MemberSet result = new MemberSet(name);
     Element element = cls.lookupSelector(selector);
     if (element !== null) result.add(element);
 
     bool isPrivate = name.isPrivate();
     Set<ClassElement> subtypesOfCls = subtypes[cls];
     if (subtypesOfCls !== null) {
       for (ClassElement sub in subtypesOfCls) {
         // Private members from a different library are not visible.
         if (isPrivate && sub.getLibrary() != library) continue;
         element = sub.lookupLocalMember(name);
         if (element !== null) result.add(element);
       }
     }
     return result;
   }
 
   /**
    * Returns the field in [type] described by the given [selector].
    * If no such field exists, or a subclass overrides the field
    * returns [:null:].
    */
-  VariableElement locateSingleField(Type type, Selector selector) {
+  VariableElement locateSingleField(DartType type, Selector selector) {
     MemberSet memberSet = _memberSetFor(type, selector);
     ClassElement cls = type.element;
     Element result = cls.lookupSelector(selector);
     if (result == null) return null;
     if (!result.isField()) return null;
 
     // Verify that no subclass overrides the field.
     if (memberSet.elements.length != 1) return null;
     assert(memberSet.elements.contains(result));
     return result;
   }
 
-  Set<ClassElement> findNoSuchMethodHolders(Type type) {
+  Set<ClassElement> findNoSuchMethodHolders(DartType type) {
     Set<ClassElement> result = new Set<ClassElement>();
     Selector noSuchMethodSelector = new Selector.noSuchMethod();
     MemberSet memberSet = _memberSetFor(type, noSuchMethodSelector);
     for (Element element in memberSet.elements) {
       ClassElement holder = element.getEnclosingClass();
       if (holder !== compiler.objectClass &&
           noSuchMethodSelector.applies(element, compiler)) {
         result.add(holder);
       }
     }
     return result;
   }
 }
 
 /**
  * A [MemberSet] contains all the possible targets for a selector.
  */
 class MemberSet {
   final Set<Element> elements;
   final SourceString name;
 
   MemberSet(SourceString this.name) : elements = new Set<Element>();
 
   void add(Element element) {
     elements.add(element);
   }
 
   bool isEmpty() => elements.isEmpty();
 }