mojo: Use ContentHandlers to bundle multiple Applications into a module.

components/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("//third_party/mojo/src/mojo/public/mojo_application.gni")
 
 source_set("lib") {
   sources = [
+    "clipboard_application_delegate.cc",
+    "clipboard_application_delegate.h",
     "clipboard_standalone_impl.cc",
     "clipboard_standalone_impl.h",
   ]
 
   deps = [
     "//components/clipboard/public/interfaces",
   ]
 }
 
 mojo_native_application("clipboard") {
@@ skipping 25 matching lines @@
     "//base",
     "//components/clipboard/public/interfaces",
     "//mojo/application",
     "//mojo/application:test_support",
     "//mojo/common",
     "//third_party/mojo/src/mojo/public/cpp/bindings",
   ]
 
   data_deps = [ ":clipboard($default_toolchain)" ]
 }