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

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

Index: pkg/compiler/lib/src/js_backend/runtime_types.dart
diff --git a/pkg/compiler/lib/src/js_backend/runtime_types.dart b/pkg/compiler/lib/src/js_backend/runtime_types.dart
index d6f02eb3ef71366ef04fc33569cf0db9a2cd09b1..b48cb05d6b9140c1c3a023e25a62c1c83b1b9cbe 100644
--- a/pkg/compiler/lib/src/js_backend/runtime_types.dart
+++ b/pkg/compiler/lib/src/js_backend/runtime_types.dart
@@ -744,7 +744,7 @@ class TypeRepresentationGenerator implements DartTypeVisitor {
 
   visitTypedefType(TypedefType type, _) {
     bool shouldEncode = shouldEncodeTypedef(type);
-    DartType unaliasedType = type.unalias(compiler);
+    DartType unaliasedType = type.unalias(compiler.resolution);
     if (shouldEncode) {
       jsAst.ObjectInitializer initializer = unaliasedType.accept(this, null);
       // We have to encode the aliased type.
@@ -814,7 +814,7 @@ class ArgumentCollector extends DartTypeVisitor {
   }
 
   visitTypedefType(TypedefType type, bool isTypeArgument) {
-    type.unalias(backend.compiler).accept(this, isTypeArgument);
+    type.unalias(backend.resolution).accept(this, isTypeArgument);
   }
 
   visitInterfaceType(InterfaceType type, bool isTypeArgument) {
@@ -846,7 +846,7 @@ class FunctionArgumentCollector extends DartTypeVisitor {
   }
 
   visitTypedefType(TypedefType type, bool inFunctionType) {
-    type.unalias(backend.compiler).accept(this, inFunctionType);
+    type.unalias(backend.resolution).accept(this, inFunctionType);
   }
 
   visitInterfaceType(InterfaceType type, bool inFunctionType) {