arc: Revamp the ArcBridgeService interface

components/arc/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("arc") {
   sources = [
     "arc_bridge_bootstrap.cc",
@@ skipping 82 matching lines @@
     ":arc_bindings",
   ]
 }
 
 static_library("arc_base") {
   sources = [
     "arc_bridge_service.cc",
     "arc_bridge_service.h",
     "arc_service.cc",
     "arc_service.h",
+    "instance_holder.h",
   ]
 
   deps = [
     "//base",
     "//chromeos",
   ]
 
   public_deps = [
     ":arc_bindings",
   ]
@@ skipping 145 matching lines @@
   ]
 
   deps = [
     ":arc_standalone",
     ":arc_standalone_service",
     "//base",
     "//ipc:ipc",
     "//mojo/edk/system",
   ]
 }