Reland [Mojo Video Capture] Hook up video capture service behind a feature flag

services/video_capture/BUILD.gn

 # Copyright 2016 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("//services/service_manager/public/cpp/service.gni")
 import("//services/service_manager/public/service_manifest.gni")
 import("//services/service_manager/public/tools/test/service_test.gni")
 import("//testing/test.gni")
 
 service("video_capture") {
@@ skipping 33 matching lines @@
     "//media",
     "//media/capture:capture",
     "//media/capture/mojo:image_capture",
     "//media/mojo/common:common",
     "//mojo/common:common_base",
     "//services/service_manager/public/cpp",
     "//services/video_capture/public/cpp",
     "//services/video_capture/public/interfaces",
     "//services/video_capture/public/interfaces:constants",
   ]
-
-  data_deps = [
-    ":manifest",
-  ]
 }
 
 source_set("tests") {
   testonly = true
 
   sources = [
     "test/device_factory_provider_test.cc",
     "test/device_factory_provider_test.h",
     "test/device_factory_provider_unittest.cc",
     "test/fake_device_descriptor_test.cc",
@@ skipping 30 matching lines @@
 
 service_manifest("unittest_manifest") {
   name = "video_capture_unittests"
   source = "test/service_unittest_manifest.json"
 }
 
 catalog("tests_catalog") {
   embedded_services = [ ":unittest_manifest" ]
   standalone_services = [ ":manifest" ]
 }