Add the network service as a data dependency of html_viewer.

mojo/services/html_viewer/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("//testing/test.gni")
 import("//third_party/mojo/src/mojo/public/mojo.gni")
 import("//third_party/mojo/src/mojo/public/mojo_application.gni")
 import("//tools/grit/repack.gni")
 
 # Repack this here.
@@ skipping 182 matching lines @@
     ]
   }
 } else {
   mojo_native_application("html_viewer") {
     sources = [
       "html_viewer.cc",
     ]
     deps = [
       ":lib",
     ]
+    data_deps = [ "//mojo/services/network:network" ]
   }
 }
 
 test("tests") {
   output_name = "html_viewer_unittests"
   sources = [
     "ax_provider_impl_unittest.cc",
     "discardable_memory_allocator_unittest.cc",
   ]
   deps = [
@@ skipping 20 matching lines @@
 
   # TODO(msw): Move this to mojo/application:test_support; see crbug.com/477104.
   data_deps = []
   if (is_android) {
     data_deps += [ "//mojo/android" ]
   }
   if (!is_component_build) {
     data_deps += [ "//mojo/shell:mojo_shell" ]
   }
 }