Provide the DeviceManager service to the renderer directly, no app.

chrome/browser/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("//build/config/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//third_party/protobuf/proto_library.gni")
 
@@ skipping 284 matching lines @@
       "//components/storage_monitor",
       "//components/syncable_prefs",
       "//components/translate/content/browser",
       "//components/upload_list",
       "//components/url_matcher",
       "//components/visitedlink/browser",
       "//components/visitedlink/common",
       "//components/web_cache/browser",
       "//components/web_modal",
       "//content/app/resources",
+      "//device/devices_app/usb/public/interfaces",
       "//media",
       "//media/midi",
       "//mojo/application/public/cpp",
       "//mojo/common",
       "//mojo/environment:chromium",
       "//net:extras",
       "//net:net_with_v8",
       "//storage/browser",
       "//storage/common",
       "//third_party/WebKit/public:image_resources",
@@ skipping 940 matching lines @@
         rebase_path(gypi_values.chrome_browser_rlz_sources, ".", "//chrome")
     deps = [
       "//components/google/core/browser",
       "//components/omnibox/browser",
       "//components/rlz",
       "//components/search_engines",
       "//rlz:rlz_lib",
     ]
   }
 }