Make elements/names.dart its own library

pkg/compiler/lib/src/patch_parser.dart

 // 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.
 
 /**
  * This library contains the infrastructure to parse and integrate patch files.
  *
  * Three types of elements can be patched: [LibraryElement], [ClassElement],
  * [FunctionElement]. Patches are introduced in patch libraries which are loaded
  * together with the corresponding origin library. Which libraries that are
@@ skipping 116 matching lines @@
 import 'elements/resolution_types.dart' show ResolutionDartType;
 import 'elements/elements.dart';
 import 'elements/modelx.dart'
     show
         BaseFunctionElementX,
         ClassElementX,
         GetterElementX,
         LibraryElementX,
         MetadataAnnotationX,
         SetterElementX;
+import 'elements/names.dart';
 import 'enqueue.dart' show DeferredAction;
 import 'id_generator.dart';
 import 'library_loader.dart' show LibraryLoader;
 import 'parser/element_listener.dart' show ElementListener;
 import 'parser/member_listener.dart' show MemberListener;
 import 'parser/partial_elements.dart'
     show ClassElementParser, PartialClassElement;
 import 'parser/diet_parser_task.dart' show PartialParser;
 import 'script.dart';
 
@@ skipping 350 matching lines @@
         origin, "Trying to patch a function more than once.");
   }
   origin.applyPatch(patch);
 }
 
 bool _isMarkedAsPatch(Compiler compiler, Element element) {
   return EagerAnnotationHandler.checkAnnotation(
           compiler, element, const PatchAnnotationHandler()) ==
       true;
 }