Patches to support Dart VM patch files in dart2js.

pkg/compiler/lib/src/resolution/resolution.dart

Index: pkg/compiler/lib/src/resolution/resolution.dart
diff --git a/pkg/compiler/lib/src/resolution/resolution.dart b/pkg/compiler/lib/src/resolution/resolution.dart
index d3081d214ca7ea3b911f12fadf65c64d57d7b9aa..66bd06781a7967552cbd69b5a48b5fc2b53889e9 100644
--- a/pkg/compiler/lib/src/resolution/resolution.dart
+++ b/pkg/compiler/lib/src/resolution/resolution.dart
@@ -223,7 +223,7 @@ class ResolverTask extends CompilerTask {
           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);
           }
         }
@@ -453,6 +453,9 @@ class ResolverTask extends CompilerTask {
       seen.add(target);
       target = nextTarget;
     }
+    if (!target.isMalformed && !target.hasFunctionSignature) {
+      target.computeType(resolution);
+    }
 
     if (target.isGenerativeConstructor && target.enclosingClass.isAbstract) {
       isMalformed = true;