Remove use of FunctionSignature et al from call_structure.dart

pkg/compiler/lib/src/universe/selector.dart

Index: pkg/compiler/lib/src/universe/selector.dart
diff --git a/pkg/compiler/lib/src/universe/selector.dart b/pkg/compiler/lib/src/universe/selector.dart
index 647c3fb39d7ad7fce70d39b8c8f76f8bba97fb0b..be129c1b084f6a062a288d79387168df94075189 100644
--- a/pkg/compiler/lib/src/universe/selector.dart
+++ b/pkg/compiler/lib/src/universe/selector.dart
@@ -14,10 +14,9 @@ import '../elements/elements.dart'
         MemberElement,
         MethodElement,
         Name,
-        LibraryElement,
         PublicName;
+import '../elements/entities.dart';
 import '../util/util.dart' show Hashing;
-import '../common/resolution.dart' show Target;
 import 'call_structure.dart' show CallStructure;
 
 class SelectorKind {
@@ -58,7 +57,7 @@ class Selector {
 
   String get name => memberName.text;
 
-  LibraryElement get library => memberName.library;
+  LibraryEntity get library => memberName.library;
 
   Selector.internal(
       this.kind, this.memberName, this.callStructure, this.hashCode) {
@@ -245,7 +244,7 @@ class Selector {
 
   bool signatureApplies(MethodElement function) {
     if (Elements.isUnresolved(function)) return false;
-    return callStructure.signatureApplies(function.functionSignature);
+    return callStructure.signatureApplies(function.type);
   }
 
   bool applies(MemberElement element) {