Update idlsync.py to pull in dependencies required for chrome api generation.

third_party/chrome/tools/test/idl_callback_arrays.idl

Index: third_party/chrome/tools/test/idl_callback_arrays.idl
diff --git a/third_party/chrome/tools/test/idl_callback_arrays.idl b/third_party/chrome/tools/test/idl_callback_arrays.idl
deleted file mode 100644
index 105e4dbae4846f190b10d68c0720608c01399916..0000000000000000000000000000000000000000
--- a/third_party/chrome/tools/test/idl_callback_arrays.idl
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Tests the case of an array of callbacks as an a argument
-
-namespace idl_callback_arrays {
-  callback MyCallback = void(long x);
-
-  interface Functions {
-    static void whatever(MyCallback[] callbacks);
-  };
-};