Move //services/clipboard code out of namespace mojo

services/clipboard/BUILD.gn

 # Copyright 2014 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/mojo_application.gni")
 
 mojo_native_application("clipboard") {
   sources = [
     "clipboard_standalone_impl.cc",
     "clipboard_standalone_impl.h",
     "main.cc",
   ]
 
   deps = [
     "//base",
     "//mojo/application",
     "//mojo/common",
     "//mojo/environment:chromium",
     "//mojo/public/cpp/bindings",
+    "//mojo/public/cpp/bindings:callback",
     "//mojo/services/public/interfaces/clipboard",
     "//ui/base",
   ]
 }
 
 mojo_native_application("apptests") {
   output_name = "clipboard_apptests"
 
   testonly = true
 
   sources = [ "clipboard_apptest.cc" ]
 
   deps = [
     "//base",
     "//mojo/application",
     "//mojo/application:test_support",
     "//mojo/common",
     "//mojo/public/cpp/bindings",
     "//mojo/services/public/interfaces/clipboard",
   ]
 
   datadeps = [ ":clipboard" ]
 }