Patches to support Dart VM patch files in dart2js.

pkg/compiler/lib/src/resolution/resolution.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 dart2js.resolution;
 
 import 'dart:collection' show Queue;
 
 import '../common.dart';
 import '../common/names.dart' show Identifiers;
@@ skipping 205 matching lines @@
       }
       if (element.isConstructor) {
         if (tree.returnType != null) {
           reporter.reportErrorMessage(
               tree, MessageKind.CONSTRUCTOR_WITH_RETURN_TYPE);
         }
         if (tree.hasBody && element.isConst) {
           if (element.isGenerativeConstructor) {
             reporter.reportErrorMessage(
                 tree, MessageKind.CONST_CONSTRUCTOR_WITH_BODY);
-          } else if (!tree.isRedirectingFactory) {
+          } else if (!tree.isRedirectingFactory && !element.isPatch) {
             reporter.reportErrorMessage(tree, MessageKind.CONST_FACTORY);
           }
         }
       }
 
       ResolverVisitor visitor = visitorFor(element);
       ResolutionRegistry registry = visitor.registry;
       registry.defineFunction(tree, element);
       visitor.setupFunction(tree, element);
       processAsyncMarker(compiler, element, registry);
@@ skipping 209 matching lines @@
       if (seen.contains(nextTarget)) {
         reporter.reportErrorMessage(
             node, MessageKind.CYCLIC_REDIRECTING_FACTORY);
         targetType = target.enclosingClass.thisType;
         isMalformed = true;
         break;
       }
       seen.add(target);
       target = nextTarget;
     }
+    if (!target.isMalformed && !target.hasFunctionSignature) {
+      target.computeType(resolution);
+    }
 
     if (target.isGenerativeConstructor && target.enclosingClass.isAbstract) {
       isMalformed = true;
     }
     if (target.isMalformed) {
       isMalformed = true;
     }
 
     if (targetType == null) {
       assert(!target.isRedirectingFactory);
@@ skipping 629 matching lines @@
   TreeElements get treeElements {
     assert(invariant(this, _treeElements != null,
         message: "TreeElements have not been computed for $this."));
     return _treeElements;
   }
 
   void reuseElement() {
     _treeElements = null;
   }
 }