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

pkg/compiler/lib/src/js_backend/constant_system_javascript.dart

Index: pkg/compiler/lib/src/js_backend/constant_system_javascript.dart
diff --git a/pkg/compiler/lib/src/js_backend/constant_system_javascript.dart b/pkg/compiler/lib/src/js_backend/constant_system_javascript.dart
index 3ebe90f647733d73db675be4a7a728af7593a8da..3dca32bb4515634d3d6e46465927ddeec5b7a12c 100644
--- a/pkg/compiler/lib/src/js_backend/constant_system_javascript.dart
+++ b/pkg/compiler/lib/src/js_backend/constant_system_javascript.dart
@@ -263,7 +263,8 @@ class JavaScriptConstantSystem extends ConstantSystem {
   @override
   ConstantValue createType(Compiler compiler, DartType type) {
     return new TypeConstantValue(
-        type, compiler.backend.typeImplementation.computeType(compiler));
+        type,
+        compiler.backend.typeImplementation.computeType(compiler.resolution));
   }
 
   // Integer checks don't verify that the number is not -0.0.
@@ -321,7 +322,7 @@ class JavaScriptConstantSystem extends ConstantSystem {
                        : JavaScriptMapConstant.DART_STRING_CLASS)
         : JavaScriptMapConstant.DART_GENERAL_CLASS;
     ClassElement classElement = backend.jsHelperLibrary.find(className);
-    classElement.ensureResolved(compiler);
+    classElement.ensureResolved(compiler.resolution);
     List<DartType> typeArgument = sourceType.typeArguments;
     InterfaceType type;
     if (sourceType.treatAsRaw) {