[Device Discovery] Make DialRegistry a Singleton

chrome/browser/media/router/BUILD.gn

 # Copyright 2015 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/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 
 static_library("router") {
   deps = [
@@ skipping 11 matching lines @@
     "browser_presentation_connection_proxy.cc",
     "browser_presentation_connection_proxy.h",
     "create_presentation_connection_request.cc",
     "create_presentation_connection_request.h",
     "discovery/dial/device_description_fetcher.cc",
     "discovery/dial/device_description_fetcher.h ",
     "discovery/dial/dial_device_data.cc",
     "discovery/dial/dial_device_data.h",
     "discovery/dial/dial_registry.cc",
     "discovery/dial/dial_registry.h",
+    "discovery/dial/dial_registry_factory.cc",
+    "discovery/dial/dial_registry_factory.h",
     "discovery/dial/dial_service.cc",
     "discovery/dial/dial_service.h",
     "discovery/media_sink_internal.cc",
     "discovery/media_sink_internal.h",
     "issue.cc",
     "issue.h",
     "issue_manager.cc",
     "issue_manager.h",
     "issues_observer.cc",
     "issues_observer.h",
@@ skipping 110 matching lines @@
       ":mojo_bindings",
       ":mojo_test_interfaces",
       "//extensions/common",
     ]
     sources += [
       "mojo/media_router_mojo_test.cc",
       "mojo/media_router_mojo_test.h",
     ]
   }
 }