Rewrite the Android implementation of BatteryMonitor directly in Java.

device/battery/android/battery_jni_registrar.h

Index: device/battery/android/battery_jni_registrar.h
diff --git a/device/battery/android/battery_jni_registrar.h b/device/battery/android/battery_jni_registrar.h
deleted file mode 100644
index faf78472ca35dde1a0463fcbc1b5367ce20ca4d7..0000000000000000000000000000000000000000
--- a/device/battery/android/battery_jni_registrar.h
+++ /dev/null
@@ -1,20 +0,0 @@
-// 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.
-
-#ifndef DEVICE_BATTERY_ANDROID_BATTERY_JNI_REGISTRAR_H_
-#define DEVICE_BATTERY_ANDROID_BATTERY_JNI_REGISTRAR_H_
-
-#include <jni.h>
-
-#include "device/battery/battery_export.h"
-
-namespace device {
-namespace android {
-
-DEVICE_BATTERY_EXPORT bool RegisterBatteryJni(JNIEnv* env);
-
-}  // namespace android
-}  // namespace device
-
-#endif  // DEVICE_BATTERY_ANDROID_BATTERY_JNI_REGISTRAR_H_