Use relative URIs for core library part-of statements.

sdk/lib/developer/service.dart

 // Copyright (c) 2016, 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 dart.developer;
+part of "developer.dart";
 
 /// Service protocol is the protocol that a client like the observatory
 /// could use to access the services provided by the Dart VM for
 /// debugging and inspecting Dart programs. This class encapsulates the
 /// version number and Uri for accessing this service.
 class ServiceProtocolInfo {
   /// The major version of the protocol. If the running Dart environment does
   /// not support the service protocol, this is 0.
   final int majorVersion = _getServiceMajorVersion();
 
@@ skipping 77 matching lines @@
 external void _webServerControl(SendPort sendPort, bool enable);
 
 /// Returns the major version of the service protocol.
 external int _getServiceMajorVersion();
 
 /// Returns the minor version of the service protocol.
 external int _getServiceMinorVersion();
 
 /// Returns the service id for the isolate that owns [sendPort].
 external String _getIsolateIDFromSendPort(SendPort sendPort);