Patches to support Dart VM patch files in dart2js.

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

Index: pkg/compiler/lib/src/resolution/send_resolver.dart
diff --git a/pkg/compiler/lib/src/resolution/send_resolver.dart b/pkg/compiler/lib/src/resolution/send_resolver.dart
index 7ef2a8623d4479392decc12b5123ab2f15ba2fba..b8b056318195f82c7cb48ee417560332ec834f42 100644
--- a/pkg/compiler/lib/src/resolution/send_resolver.dart
+++ b/pkg/compiler/lib/src/resolution/send_resolver.dart
@@ -59,7 +59,8 @@ class ConstructorDeclStructure<R, A> extends DeclStructure<R, A> {
 
 class RedirectingFactoryConstructorDeclStructure<R, A>
     extends DeclStructure<R, A> {
-  InterfaceType redirectionTargetType;
+  // TODO(ahe): Construct invalid something instead.
+  DartType redirectionTargetType;
   ConstructorElement redirectionTarget;
 
   RedirectingFactoryConstructorDeclStructure(ConstructorElement constructor,
@@ -224,12 +225,15 @@ abstract class DeclarationResolverMixin {
     bool constructorInvocationSeen = false;
     if (list != null) {
       for (Node initializer in list) {
-        InitializerStructure structure =
-            computeInitializerStructure(initializer);
-        if (structure.isConstructorInvoke) {
-          constructorInvocationSeen = true;
+        if (elements[initializer] != null) {
+          // TODO(ahe): Create erroneous structure.
+          InitializerStructure structure =
+              computeInitializerStructure(initializer);
+          if (structure.isConstructorInvoke) {
+            constructorInvocationSeen = true;
+          }
+          initializers.add(structure);
         }
-        initializers.add(structure);
       }
     }
     if (!constructorInvocationSeen) {