Port BatteryMonitor into Device Service

services/device/android/java/src/org/chromium/services/device/InterfaceRegistrar.java

Index: services/device/android/java/src/org/chromium/services/device/InterfaceRegistrar.java
diff --git a/services/device/android/java/src/org/chromium/services/device/InterfaceRegistrar.java b/services/device/android/java/src/org/chromium/services/device/InterfaceRegistrar.java
new file mode 100644
index 0000000000000000000000000000000000000000..862880103e10fedcd0c74d0064f20c2f84df0aac
--- /dev/null
+++ b/services/device/android/java/src/org/chromium/services/device/InterfaceRegistrar.java
@@ -0,0 +1,27 @@
+// Copyright 2017 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.
+
+package org.chromium.device_service;
+
+import android.content.Context;
+
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.base.annotations.JNINamespace;
+import org.chromium.device.BatteryMonitor;
+import org.chromium.device.battery.BatteryMonitorFactory;
+import org.chromium.mojo.system.impl.CoreImpl;
+import org.chromium.services.service_manager.InterfaceRegistry;
+
+@JNINamespace("device")
+class InterfaceRegistrar {
+    @CalledByNative
+    static void createInterfaceRegistryForContext(int nativeHandle, Context applicationContext) {
+        // Note: The bindings code manages the lifetime of this object, so it
+        // is not necessary to hold on to a reference to it explicitly.
+        InterfaceRegistry registry = InterfaceRegistry.create(
+                CoreImpl.getInstance().acquireNativeHandle(nativeHandle).toMessagePipeHandle());
+        registry.addInterface(
+                BatteryMonitor.MANAGER, new BatteryMonitorFactory(applicationContext));
+    }
+}