Move scanner into pkg/front_end/lib/src/scanner.

pkg/analyzer/lib/src/generated/interner.dart

Index: pkg/analyzer/lib/src/generated/interner.dart
diff --git a/pkg/analyzer/lib/src/generated/interner.dart b/pkg/analyzer/lib/src/generated/interner.dart
index 9741f2835b31fecb2636bb51b394178ca1703eaa..7bb6e5b4cb4f1044cc32e657cd9c7734d312a7c3 100644
--- a/pkg/analyzer/lib/src/generated/interner.dart
+++ b/pkg/analyzer/lib/src/generated/interner.dart
@@ -6,17 +6,10 @@ library analyzer.src.generated.interner;
 
 import 'dart:collection';
 
-/**
- * The interface `Interner` defines the behavior of objects that can intern
- * strings.
- */
-abstract class Interner {
-  /**
-   * Return a string that is identical to all of the other strings that have
-   * been interned that are equal to the given [string].
-   */
-  String intern(String string);
-}
+import 'package:front_end/src/scanner/interner.dart';
+
+export 'package:front_end/src/scanner/interner.dart'
+    show Interner, NullInterner;
 
 /**
  * The class `MappedInterner` implements an interner that uses a map to manage
@@ -38,12 +31,3 @@ class MappedInterner implements Interner {
     return original;
   }
 }
-
-/**
- * The class `NullInterner` implements an interner that does nothing (does not
- * actually intern any strings).
- */
-class NullInterner implements Interner {
-  @override
-  String intern(String string) => string;
-}