Introduce LibraryEntity

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

Index: pkg/compiler/lib/src/elements/entities.dart
diff --git a/pkg/compiler/lib/src/elements/entities.dart b/pkg/compiler/lib/src/elements/entities.dart
index c7942686970011a70dbed104d97a808ae5493d10..df0abbe37eb1c723941476ed1d35872388cf6843 100644
--- a/pkg/compiler/lib/src/elements/entities.dart
+++ b/pkg/compiler/lib/src/elements/entities.dart
@@ -6,6 +6,14 @@ library entities;
 
 import 'elements.dart' show Entity;
 
+/// Stripped down super interface for library like entities.
+///
+/// Currently only [LibraryElement] but later also kernel based Dart classes
+/// and/or Dart-in-JS classes.
+abstract class LibraryEntity extends Entity {
+  String get libraryName;

[Siggi Cherem (dart-lang), 2017/01/12 00:00:33]

I wonder if we actually ever want the libraryName in the entity, or just the URI

[Johnni Winther, 2017/01/12 12:29:05]

We don't. I'd rather use [name] but it has different semantics currently.

[Siggi Cherem (dart-lang), 2017/01/12 18:36:53]

is the idea then to remove this field and change it to [uri]? should we mark it
with a comment/TODO/@deprecated?

[Johnni Winther, 2017/01/13 08:27:14]

Will do.

+}
+
 /// Stripped down super interface for class like entities.
 ///
 /// Currently only [ClassElement] but later also kernel based Dart classes