Replace Chrome IPC with Mojo IPC for querying BatteryStatus service

device/battery/BUILD.gn

Index: device/battery/BUILD.gn
diff --git a/device/battery/BUILD.gn b/device/battery/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..b5726a8c8ece8600630d338f91e724d2d8e8bfd6
--- /dev/null
+++ b/device/battery/BUILD.gn
@@ -0,0 +1,90 @@
+# 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")
+
+component("battery") {
+  output_name = "device_battery"
+
+  sources = [
+    "battery_export.h",
+    "battery_monitor_impl.cc",
+    "battery_monitor_impl.h",
+    "battery_status_manager_android.cc",
+    "battery_status_manager_android.h",
+    "battery_status_manager_chromeos.cc",
+    "battery_status_manager_default.cc",
+    "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",
+  ]
+
+  deps = [
+    ":mojo_bindings",
+    "//base",
+    "//base/third_party/dynamic_annotations",
+    "//mojo/environment:chromium",
+    "//mojo/public/cpp/bindings",
+    "//mojo/system",
+  ]
+
+  if (is_chromeos) {
+    configs += [
+      "//build/config/linux:dbus",
+    ]
+    deps += [
+      "//chromeos:power_manager_proto",
+    ]
+    sources -= [
+      "battery_status_manager_default.cc",
+      "battery_status_manager_linux.cc",
+    ]
+  }
+
+  if (is_linux) {
+    if (use_dbus) {
+      configs += [
+        "//build/config/linux:dbus",
+      ]
+      deps += [
+        "//dbus"
+      ]
+      sources -= [
+        "battery_status_manager_default.cc",
+      ]
+    } else {
+      sources -= [
+        "battery_status_manager_linux.cc",
+      ]
+    }
+  }
+
+  if (is_mac) {
+    sources -= [
+      "battery_status_manager_default.cc",
+    ]
+  }
+
+  if (is_win) {
+    sources -= [
+      "battery_status_manager_default.cc",
+    ]
+  }
+}
+
+mojom("mojo_bindings") {
+  sources = [
+    "battery_monitor.mojom",
+    "battery_status.mojom",
+  ]
+}