Support serialization of the compiler backbone.

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.
 
 part of resolution;
 
 /// The state of constants in resolutions.
 enum ConstantState {
   /// Expressions are not required to be constants.
   NON_CONSTANT,
@@ skipping 2050 matching lines @@
     if (node.isCall) {
       ArgumentsResult argumentsResult =
           resolveArguments(node.argumentsNode);
       CallStructure callStructure = argumentsResult.callStructure;
       selector = new Selector(SelectorKind.CALL, name, callStructure);
 
       bool isIncompatibleInvoke = false;
       switch (semantics.kind) {
         case AccessKind.STATIC_METHOD:
         case AccessKind.TOPLEVEL_METHOD:
-          MethodElementX method = semantics.element;
-          method.computeSignature(compiler);
+          MethodElement method = semantics.element;
+          method.computeType(compiler);
           if (!callStructure.signatureApplies(method.functionSignature)) {
             registry.registerThrowNoSuchMethod();
             registry.registerDynamicInvocation(
                 new UniverseSelector(selector, null));
             isIncompatibleInvoke = true;
           } else {
             registry.registerStaticUse(semantics.element);
             handleForeignCall(node, semantics.element, selector);
             if (method == compiler.identicalFunction &&
                 argumentsResult.isValidAsConstant) {
@@ skipping 1590 matching lines @@
     }
     return const NoneResult();
   }
 }
 
 /// Looks up [name] in [scope] and unwraps the result.
 Element lookupInScope(Compiler compiler, Node node,
                       Scope scope, String name) {
   return Elements.unwrap(scope.lookup(name), compiler, node);
 }