Add Resolution and Parsing interfaces for computeType, ensureResolved and parseNode.

pkg/compiler/lib/src/resolution/signatures.dart

 // Copyright (c) 2014, 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.signatures;
 
 import '../compiler.dart' show
     Compiler;
 import '../dart_types.dart';
 import '../diagnostics/invariant.dart' show
@@ skipping 130 matching lines @@
       } else if (link.head.asSend() != null &&
                  link.head.asSend().selector.asFunctionExpression() != null) {
         // Inline function typed initializing formal or
         // parameter with default value, like `C(int this.f(String s))` or
         // `void m([int f(String s) = null])`.
         computeFunctionType(link.head.asSend().selector.asFunctionExpression());
       } else {
         assert(invariant(currentDefinitions,
             link.head.asIdentifier() != null || link.head.asSend() != null));
         if (fieldElement != null) {
-          element.typeCache = fieldElement.computeType(compiler);
+          element.typeCache = fieldElement.computeType(resolution);
         } else {
           element.typeCache = const DynamicType();
         }
       }
     }
   }
 
   FormalElementX visitIdentifier(Identifier node) {
     return createParameter(node, null);
   }
@@ skipping 278 matching lines @@
 
   DartType resolveReturnType(TypeAnnotation annotation) {
     if (annotation == null) return const DynamicType();
     DartType result = resolver.resolveTypeAnnotation(annotation);
     if (result == null) {
       return const DynamicType();
     }
     return result;
   }
 }