Make hashCode a getter and not a method.

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 'dart:uri';
 
 // TODO(ahe): Rename prefix to 'api' when VM bug is fixed.
 import '../../compiler.dart' as api_e;
@@ skipping 246 matching lines @@
   Token findMyName(Token token) {
     for (Token t = token; !identical(t.kind, EOF_TOKEN); t = t.next) {
       if (t.value == name) return t;
     }
     return token;
   }
 
   // TODO(kasperl): This is a very bad hash code for the element and
   // there's no reason why two elements with the same name should have
   // the same hash code. Replace this with a simple id in the element?
-  int hashCode() => name == null ? 0 : name.hashCode();
+  int get hashCode => name == null ? 0 : name.hashCode;
 
   CompilationUnitElement getCompilationUnit() {
     Element element = this;
     while (!element.isCompilationUnit()) {
       element = element.enclosingElement;
     }
     return element;
   }
 
   LibraryElement getLibrary() => enclosingElement.getLibrary();
@@ skipping 1359 matching lines @@
    */
   bool isSubclassOf(ClassElement cls) {
     for (ClassElement s = this; s != null; s = s.superclass) {
       if (identical(s, cls)) return true;
     }
     return false;
   }
 
   bool isInterface() => false;
   bool isNative() => nativeName != null;
-  int hashCode() => id;
+  int get hashCode => id;
 
   // TODO(johnniwinther): Rewrite to avoid the optional argument.
   Scope buildScope({bool patchScope: false}) {
     if (origin != null) {
       return new PatchClassScope(
           enclosingElement.buildScope(patchScope: patchScope), origin, this);
     } else if (patchScope && patch != null) {
       return new PatchClassScope(
           enclosingElement.buildScope(patchScope: patchScope), this, patch);
     } else {
@@ skipping 311 matching lines @@
 
   MetadataAnnotation ensureResolved(Compiler compiler) {
     if (resolutionState == STATE_NOT_STARTED) {
       compiler.resolver.resolveMetadataAnnotation(this);
     }
     return this;
   }
 
   String toString() => 'MetadataAnnotation($value, $resolutionState)';
 }