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

tests/compiler/dart2js/type_equals_test.dart

Index: tests/compiler/dart2js/type_equals_test.dart
diff --git a/tests/compiler/dart2js/type_equals_test.dart b/tests/compiler/dart2js/type_equals_test.dart
index 3b71f5fd8b26706c75290055a620663d8964be10..e7e40386b36fbbb544781de022b089032baf48eb 100644
--- a/tests/compiler/dart2js/type_equals_test.dart
+++ b/tests/compiler/dart2js/type_equals_test.dart
@@ -10,15 +10,17 @@ import "compiler_helper.dart";
 bool test(compiler, String name1, String name2, {bool expect}) {
   Expect.isTrue((expect != null), 'required parameter "expect" not given');
   var clazz = findElement(compiler, "Class");
-  clazz.ensureResolved(compiler);
+  clazz.ensureResolved(compiler.resolution);
   var element1 = clazz.buildScope().lookup(name1);
   var element2 = clazz.buildScope().lookup(name2);
   Expect.isNotNull(element1);
   Expect.isNotNull(element2);
   Expect.equals(element1.kind, ElementKind.FUNCTION);
   Expect.equals(element2.kind, ElementKind.FUNCTION);
-  FunctionSignature signature1 = element1.computeSignature(compiler);
-  FunctionSignature signature2 = element2.computeSignature(compiler);
+  FunctionSignature signature1 =
+      element1.computeSignature(compiler.resolution);
+  FunctionSignature signature2 =
+      element2.computeSignature(compiler.resolution);
 
   // Function signatures are used to be to provide void types (only occuring as
   // as return types) and (inlined) function types (only occuring as method