Move AST implementation out of generated

pkg/analyzer/lib/src/dart/ast/ast.dart

Index: pkg/analyzer/lib/src/dart/ast/ast.dart
diff --git a/pkg/analyzer/lib/src/generated/ast.dart b/pkg/analyzer/lib/src/dart/ast/ast.dart
similarity index 99%
copy from pkg/analyzer/lib/src/generated/ast.dart
copy to pkg/analyzer/lib/src/dart/ast/ast.dart
index 45a0703278c0c6afb8add720a8af0f387da39179..26e3b760ecacbd5983f0c9fa3776b2da3a86e86e 100644
--- a/pkg/analyzer/lib/src/generated/ast.dart
+++ b/pkg/analyzer/lib/src/dart/ast/ast.dart
@@ -2,7 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-library analyzer.src.generated.ast;
+library analyzer.src.dart.ast.ast;
 
 import 'dart:collection';
 
@@ -20,10 +20,6 @@ import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/source.dart' show LineInfo, Source;
 import 'package:analyzer/src/generated/utilities_dart.dart';
 
-export 'package:analyzer/dart/ast/ast.dart';
-export 'package:analyzer/dart/ast/visitor.dart';
-export 'package:analyzer/src/dart/ast/utilities.dart';
-
 /**
  * Two or more string literals that are implicitly concatenated because of being
  * adjacent (separated only by whitespace).