Fix handling of device cloud signing policy key rotation

chromeos/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/ui.gni")
 import("//testing/test.gni")
 import("//third_party/protobuf/proto_library.gni")
 
 assert(is_chromeos, "Non-ChromeOS builds must not depend on //chromeos")
 
@@ skipping 115 matching lines @@
 }
 
 static_library("test_support_without_gmock") {
   testonly = true
   configs += [ "//build/config/linux/dbus" ]
   deps = [
     ":attestation_proto",
     ":chromeos",
     ":cryptohome_proto",
     ":power_manager_proto",
+    "//components/policy/proto",
     "//crypto",
   ]
   sources = [
     "dbus/fake_cros_disks_client.cc",
     "dbus/fake_cros_disks_client.h",
     "dbus/fake_session_manager_client.cc",
     "dbus/fake_session_manager_client.h",
     "dbus/fake_shill_manager_client.cc",
     "dbus/fake_shill_manager_client.h",
     "dbus/fake_update_engine_client.cc",
@@ skipping 70 matching lines @@
   proto_out_dir = "chromeos/attestation"
 }
 
 proto_library("cryptohome_signkey_proto") {
   sources = [
     "//third_party/cros_system_api/dbus/cryptohome/signed_secret.proto",
   ]
 
   proto_out_dir = "chromeos/cryptohome"
 }