[DeviceService] Expose battery monitoring solely via the Device Service

services/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("//mojo/public/tools/bindings/mojom.gni")
 
-# On android, BatteryManager mojo service is implemented directly in Java.
+# On android, BatteryManager mojo interface is implemented directly in Java.
 if (!is_android) {
-  component("battery") {
-    output_name = "device_battery"
+  source_set("battery") {
+    visibility = [
+      "//services/device:lib",
+      "//services/device:tests",
+    ]
 
     sources = [
-      "battery_export.h",
       "battery_monitor_impl.cc",
       "battery_monitor_impl.h",
       "battery_status_manager.h",
       "battery_status_manager_chromeos.cc",
       "battery_status_manager_default.cc",
       "battery_status_manager_linux-inl.h",
       "battery_status_manager_linux.cc",
       "battery_status_manager_linux.h",
       "battery_status_manager_mac.cc",
       "battery_status_manager_win.cc",
       "battery_status_manager_win.h",
       "battery_status_service.cc",
       "battery_status_service.h",
     ]
 
-    defines = [ "DEVICE_BATTERY_IMPLEMENTATION" ]
+    public_deps = [
+      "//services/device/public/interfaces",
+    ]
 
     deps = [
-      ":mojo_bindings",
       "//base",
       "//base/third_party/dynamic_annotations",
       "//mojo/public/cpp/bindings",
     ]
 
     if (is_chromeos) {
       configs += [ "//build/config/linux/dbus" ]
       deps += [
         "//chromeos:chromeos",
         "//chromeos:power_manager_proto",
@@ skipping 20 matching lines @@
         "CoreFoundation.framework",
         "IOKit.framework",
       ]
     }
 
     if (is_win) {
       sources -= [ "battery_status_manager_default.cc" ]
     }
   }
 }
-
-mojom("mojo_bindings") {
-  sources = [
-    "battery_monitor.mojom",
-    "battery_status.mojom",
-  ]
-}