Move js library back into compiler directory.

sdk/lib/_internal/lib/internal_patch.dart

Index: sdk/lib/_internal/lib/internal_patch.dart
diff --git a/sdk/lib/_internal/lib/internal_patch.dart b/sdk/lib/_internal/lib/internal_patch.dart
deleted file mode 100644
index 16afd5f3aa6332ec62190bdf31b5ff3455f4f898..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/lib/internal_patch.dart
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright (c) 2013, 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.
-
-import 'dart:_js_primitives' show printString;
-import 'dart:_js_helper' show JS, patch;
-import 'dart:_interceptors' show JSArray;
-
-@patch
-class Symbol implements core.Symbol {
-  @patch
-  const Symbol(String name)
-      : this._name = name;
-}
-
-@patch
-void printToConsole(String line) {
-  printString('$line');
-}
-
-@patch
-List makeListFixedLength(List growableList) {
-  JSArray.markFixedList(growableList);
-  return growableList;
-}