Compute function types together with the parameters.

lib/compiler/implementation/compiler.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.
 
 class WorkItem {
   final Element element;
   TreeElements resolutionTree;
   Function run;
   bool allowSpeculativeOptimization = true;
   List<HTypeGuard> guards = const <HTypeGuard>[];
@@ skipping 274 matching lines @@
     mainApp = scanner.loadLibrary(uri, null);
     final Element main = mainApp.find(MAIN);
     if (main === null) {
       withCurrentElement(mainApp, () => cancel('Could not find $MAIN'));
     } else {
       withCurrentElement(main, () {
         if (!main.isFunction()) {
           cancel('main is not a function', element: main);
         }
         FunctionElement mainMethod = main;
-        FunctionParameters parameters = mainMethod.computeParameters(this);
+        FunctionSignature parameters = mainMethod.computeSignature(this);
         if (parameters.parameterCount > 0) {
           cancel('main cannot have parameters', element: mainMethod);
         }
       });
     }
     native.processNativeClasses(this, universe.libraries.getValues());
     enqueue(new WorkItem.toCompile(main));
     codegenProgress.reset();
     while (!worklist.isEmpty()) {
       WorkItem work = worklist.removeLast();
@@ skipping 107 matching lines @@
   }
 
   void resolveClass(ClassElement element) {
     withCurrentElement(element, () => resolver.resolveClass(element));
   }
 
   Type resolveTypeAnnotation(Element element, TypeAnnotation annotation) {
     return resolver.resolveTypeAnnotation(element, annotation);
   }
 
-  FunctionParameters resolveSignature(FunctionElement element) {
+  FunctionSignature resolveSignature(FunctionElement element) {
     return withCurrentElement(element,
                               () => resolver.resolveSignature(element));
   }
 
   Constant compileVariable(VariableElement element) {
     return withCurrentElement(element, () {
       return constantHandler.compileVariable(element);
     });
   }
 
@@ skipping 133 matching lines @@
   }
 }
 
 class SourceSpan {
   final Uri uri;
   final int begin;
   final int end;
 
   const SourceSpan(this.uri, this.begin, this.end);
 }