Revert "Move dart2js from sdk/lib/_internal/compiler to pkg/compiler"

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

-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
-// 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.
-
-part of elements;
-
-/// A [Name] represents the abstraction of a Dart identifier which takes privacy
-/// and setter into account.
-// TODO(johnniwinther): Try to share logic with [Selector].
-abstract class Name {
-  /// Create a [Name] for an identifier [text]. If [text] begins with '_' a
-  /// private name with respect to [library] is created. If [isSetter] is `true`
-  /// the created name represents the setter name 'text='.
-  factory Name(String text, LibraryElement library, {bool isSetter: false}) {
-    if (isPrivateName(text)) {
-      return new PrivateName(text, library, isSetter: isSetter);
-    }
-    return new PublicName(text, isSetter: isSetter);
-  }
-
-  /// The text of the name without prefixed library name or suffixed '=' if
-  /// applicable.
-  String get text;
-
-  /// Is `true` if this name represents the name of a setter.
-  bool get isSetter;
-
-  /// Returns the getter name corresponding to this name. If this name is a
-  /// setter name 'v=' then the name 'v' is returned, otherwise the name itself
-  /// is returned.
-  Name get getter;
-
-  /// Returns the seeter name corresponding to this name. If this name is a
-  /// getter name 'v' then the name 'v=' is returned, otherwsie the name itself
-  /// is returned.
-  Name get setter;
-
-  /// Returns `true` if an entity of this name is accessible from library
-  /// [element].
-  bool isAccessibleFrom(LibraryElement element);
-
-  /// Returns `true` if this name is private.
-  bool get isPrivate;
-
-  /// Returns `true` if this name is the same as [other] not taking the library
-  /// privacy into account.
-  bool isSimilarTo(Name other);
-  int get similarHashCode;
-}
-
-class PublicName implements Name {
-  final String text;
-  final bool isSetter;
-
-  const PublicName(this.text, {this.isSetter: false});
-
-  Name get getter => isSetter ? new PublicName(text) : this;
-
-  Name get setter => isSetter ? this : new PublicName(text, isSetter: true);
-
-  bool isAccessibleFrom(LibraryElement element) => true;
-
-  bool get isPrivate => false;
-
-  int get hashCode => similarHashCode;
-
-  bool operator ==(other) {
-    if (other is! PublicName) return false;
-    return isSimilarTo(other);
-  }
-
-  bool isSimilarTo(Name other) =>
-      text == other.text && isSetter == other.isSetter;
-  int get similarHashCode => text.hashCode + 11 * isSetter.hashCode;
-
-  String toString() => isSetter ? '$text=' : text;
-}
-
-class PrivateName extends PublicName {
-  final LibraryElement library;
-
-  PrivateName(String text, this.library, {bool isSetter: false})
-      : super(text, isSetter: isSetter);
-
-  Name get getter => isSetter ? new PrivateName(text, library) : this;
-
-  Name get setter {
-    return isSetter ? this : new PrivateName(text, library, isSetter: true);
-  }
-
-  bool isAccessibleFrom(LibraryElement element) => library == element;
-
-  bool get isPrivate => true;
-
-  int get hashCode => super.hashCode + 13 * library.hashCode;
-
-  bool operator ==(other) {
-    if (other is! PrivateName) return false;
-    return super==(other) && library == other.library;
-  }
-
-  String toString() => '${library.getLibraryName()}#${super.toString()}';
-}