Enable find-missing-symbols-at-link-time for chromeos builds too.

device/battery/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/features.gni")
 import("//third_party/mojo/src/mojo/public/tools/bindings/mojom.gni")
 
 component("battery") {
   output_name = "device_battery"
 
@@ skipping 18 matching lines @@
     ":mojo_bindings",
     "//base",
     "//base/third_party/dynamic_annotations",
     "//mojo/environment:chromium",
     "//third_party/mojo/src/mojo/public/cpp/bindings",
     "//third_party/mojo/src/mojo/edk/system",
   ]
 
   if (is_chromeos) {
     configs += [ "//build/config/linux:dbus" ]
-    deps += [ "//chromeos:power_manager_proto" ]
+    deps += [
+      "//chromeos:chromeos",
+      "//chromeos:power_manager_proto",
+    ]
     sources -= [
       "battery_status_manager_default.cc",
       "battery_status_manager_linux.cc",
     ]
   }
 
   if (is_desktop_linux) {
     if (use_dbus) {
       configs += [ "//build/config/linux:dbus" ]
       deps += [ "//dbus" ]
@@ skipping 11 matching lines @@
     sources -= [ "battery_status_manager_default.cc" ]
   }
 }
 
 mojom("mojo_bindings") {
   sources = [
     "battery_monitor.mojom",
     "battery_status.mojom",
   ]
 }