Remove use of FunctionSignature et al from call_structure.dart

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

Index: pkg/compiler/lib/src/resolution/constructors.dart
diff --git a/pkg/compiler/lib/src/resolution/constructors.dart b/pkg/compiler/lib/src/resolution/constructors.dart
index 87c8cc72e0253561ea1dc62fdbd1ffab1e64193d..90964c872c6d3f916a571306d9810ccc8e906fbe 100644
--- a/pkg/compiler/lib/src/resolution/constructors.dart
+++ b/pkg/compiler/lib/src/resolution/constructors.dart
@@ -275,8 +275,7 @@ class InitializerResolver {
           reportAndCreateErroneousConstructor(node, constructorName, kind, {});
     } else {
       lookedupConstructor.computeType(visitor.resolution);
-      if (!callStructure
-          .signatureApplies(lookedupConstructor.functionSignature)) {
+      if (!callStructure.signatureApplies(lookedupConstructor.type)) {
         MessageKind kind = isImplicitSuperCall
             ? MessageKind.NO_MATCHING_CONSTRUCTOR_FOR_IMPLICIT
             : MessageKind.NO_MATCHING_CONSTRUCTOR;