Make computeSignature private to modelx.

pkg/compiler/lib/src/closure.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 closureToClassMapper;
 
 import 'common/names.dart' show
     Identifiers;
 import 'common/resolution.dart' show
     Parsing,
@@ skipping 300 matching lines @@
 class SynthesizedCallMethodElementX extends BaseFunctionElementX
     implements MethodElement {
   final LocalFunctionElement expression;
 
   SynthesizedCallMethodElementX(String name,
                                 LocalFunctionElementX other,
                                 ClosureClassElement enclosing)
       : expression = other,
         super(name, other.kind, other.modifiers, enclosing) {
     asyncMarker = other.asyncMarker;
-    functionSignatureCache = other.functionSignature;
+    functionSignature = other.functionSignature;
   }
 
   /// Use [closureClass] instead.
   @deprecated
   get enclosingElement => super.enclosingElement;
 
   ClosureClassElement get closureClass => super.enclosingElement;
 
   MemberElement get memberContext {
     return closureClass.methodElement.memberContext;
@@ skipping 793 matching lines @@
 
   String get name => typeVariable.name;
 
   int get hashCode => typeVariable.hashCode;
 
   bool operator ==(other) {
     if (other is! TypeVariableLocal) return false;
     return typeVariable == other.typeVariable;
   }
 }