Make computeSignature private to modelx.

pkg/compiler/lib/src/resolution/members.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 dart2js.resolution.members;
 
 import '../common/names.dart' show
     Selectors;
 import '../compiler.dart' show
     Compiler;
@@ skipping 601 matching lines @@
     String name;
     if (node.name == null) {
       name = "";
     } else {
       name = node.name.asIdentifier().source;
     }
     LocalFunctionElementX function = new LocalFunctionElementX(
         name, node, ElementKind.FUNCTION, Modifiers.EMPTY,
         enclosingElement);
     ResolverTask.processAsyncMarker(compiler, function, registry);
-    function.functionSignatureCache = SignatureResolver.analyze(
+    function.functionSignature = SignatureResolver.analyze(
         compiler,
         node.parameters,
         node.returnType,
         function,
         registry,
         createRealParameters: true,
         isFunctionExpression: !inFunctionDeclaration);
     checkLocalDefinitionName(node, function);
     registry.defineFunction(node, function);
     if (doAddToScope) {
@@ skipping 4058 matching lines @@
     }
     return const NoneResult();
   }
 }
 
 /// Looks up [name] in [scope] and unwraps the result.
 Element lookupInScope(DiagnosticReporter reporter, Node node,
                       Scope scope, String name) {
   return Elements.unwrap(scope.lookup(name), reporter, node);
 }