Change toString on ResolutionTypeVariableType to include class/method name

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 f6a5ffe625523dd6f134391efe0503d60ab23d56..4c1eed13f228b8588488b11961ed28045a76d7e3 100644
--- a/pkg/compiler/lib/src/js_backend/runtime_types.dart
+++ b/pkg/compiler/lib/src/js_backend/runtime_types.dart
@@ -759,7 +759,7 @@ class _RuntimeTypesEncoder implements RuntimeTypesEncoder {
       List<String> parameters = const <String>[];
       if (contextClass != null) {
         parameters = contextClass.typeVariables.map((type) {
-          return type.toString();
+          return type.name;
         }).toList();
       }
       return js('function(#) { return # }', [parameters, encoding]);