Fix GN build for components/session_manager and /chromeos

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/allocator.gni")
 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 10 matching lines @@
   ]
   deps = [
     "//base",
     "//base:i18n",
     "//base:prefs",
     "//base/third_party/dynamic_annotations",
     "//chromeos/ime:gencode",
     "//components/policy/proto",
     "//components/onc",
     "//crypto",
+    "//crypto:platform",
     "//google_apis",
     "//net/third_party/nss/ssl:libssl",
     "//third_party/icu",
     "//third_party/libxml",
     "//third_party/protobuf:protobuf_lite",
     "//ui/accelerometer",
     "//ui/gfx/geometry",
     "//url",
     ":cryptohome_proto",
     ":power_manager_proto",
@@ skipping 131 matching lines @@
   proto_out_dir = "chromeos/dbus/cryptohome"
 }
 
 proto_library("cryptohome_signkey_proto") {
   sources = [
     "//third_party/cros_system_api/dbus/cryptohome/signed_secret.proto",
   ]
 
   proto_out_dir = "chromeos/cryptohome"
 }