Rename 'dart:debugger' to 'dart:developer'

runtime/lib/debugger_sources.gypi

Index: runtime/lib/debugger_sources.gypi
diff --git a/runtime/lib/debugger_sources.gypi b/runtime/lib/debugger_sources.gypi
deleted file mode 100644
index 3f54e81a0d5b0112ae67d6f0a86128a008bc3ac0..0000000000000000000000000000000000000000
--- a/runtime/lib/debugger_sources.gypi
+++ /dev/null
@@ -1,13 +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.
-
-# Sources visible via dart:debugger library.
-
-{
-  'sources': [
-    'debugger.cc',
-    'debugger.dart',
-  ],
-}
-