Change toString on ResolutionTypeVariableType to include class/method name

pkg/compiler/lib/src/elements/resolution_types.dart

Index: pkg/compiler/lib/src/elements/resolution_types.dart
diff --git a/pkg/compiler/lib/src/elements/resolution_types.dart b/pkg/compiler/lib/src/elements/resolution_types.dart
index 5ab0f2bb50f470a01a6077aa079b23c67a9dccf4..9604f16263d263a85d885bf65d24cde12de6eb21 100644
--- a/pkg/compiler/lib/src/elements/resolution_types.dart
+++ b/pkg/compiler/lib/src/elements/resolution_types.dart
@@ -250,7 +250,7 @@ class ResolutionTypeVariableType extends ResolutionDartType
     return identical(other.element, element);
   }
 
-  String toString() => name;
+  String toString() => '${element.typeDeclaration.name}.$name';
 }
 
 /// Provides a thin model of method type variables: They are treated as if