Move python content handler to //services/

examples/python/BUILD.gn

 # Copyright 2015 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.
 
 import("//mojo/public/python/rules.gni")
 
 group("python") {
   testonly = true
   deps = [
     ":python_example_service",
   ]
 }
 
 python_packaged_application("python_example_service") {
   sources = [
     "__mojo__.py",
   ]
   deps = [
     "//examples/apptest:bindings",
     "//mojo/public/interfaces/application",
     "//mojo/public/python:packaged_bindings",
   ]
   datadeps = [
-    "//mojo/python/content_handler",
+    "//services/python/content_handler",
   ]
 }