Move lib from sdk/lib/_internal/compiler/implementation to _internal root.

sdk/lib/_internal/compiler/implementation/lib/constant_map.dart

Index: sdk/lib/_internal/compiler/implementation/lib/constant_map.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/lib/constant_map.dart	(revision 23664)
+++ sdk/lib/_internal/compiler/implementation/lib/constant_map.dart	(working copy)
@@ -1,77 +0,0 @@
-// Copyright (c) 2012, 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 _js_helper;
-
-// This class has no constructor. This is on purpose since the instantiation
-// is shortcut by the compiler.
-class ConstantMap<V> implements Map<String, V> {
-  final int length;
-  // A constant map is backed by a JavaScript object.
-  final _jsObject;
-  final List<String> _keys;
-
-  bool containsValue(V needle) {
-    return values.any((V value) => value == needle);
-  }
-
-  bool containsKey(String key) {
-    if (key == '__proto__') return false;
-    return jsHasOwnProperty(_jsObject, key);
-  }
-
-  V operator [](String key) {
-    if (!containsKey(key)) return null;
-    return jsPropertyAccess(_jsObject, key);
-  }
-
-  void forEach(void f(String key, V value)) {
-    _keys.forEach((String key) => f(key, this[key]));
-  }
-
-  Iterable<String> get keys {
-    return new _ConstantMapKeyIterable(this);
-  }
-
-  Iterable<V> get values {
-    return _keys.map((String key) => this[key]);
-  }
-
-  bool get isEmpty => length == 0;
-
-  bool get isNotEmpty => !isEmpty;
-
-  String toString() => Maps.mapToString(this);
-
-  _throwUnmodifiable() {
-    throw new UnsupportedError("Cannot modify unmodifiable Map");
-  }
-  void operator []=(String key, V val) => _throwUnmodifiable();
-  V putIfAbsent(String key, V ifAbsent()) => _throwUnmodifiable();
-  V remove(String key) => _throwUnmodifiable();
-  void clear() => _throwUnmodifiable();
-}
-
-// This class has no constructor. This is on purpose since the instantiation
-// is shortcut by the compiler.
-class ConstantProtoMap<V> extends ConstantMap<V> {
-  final V _protoValue;
-
-  bool containsKey(String key) {
-    if (key == '__proto__') return true;
-    return super.containsKey(key);
-  }
-
-  V operator [](String key) {
-    if (key == '__proto__') return _protoValue;
-    return super[key];
-  }
-}
-
-class _ConstantMapKeyIterable extends IterableBase<String> {
-  ConstantMap _map;
-  _ConstantMapKeyIterable(this._map);
-
-  Iterator<String> get iterator => _map._keys.iterator;
-}