Android: Integrates native and java SystemMonitor.

base/system_monitor/system_monitor_android.cc

 // Copyright (c) 2011 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.
 
 #include "base/system_monitor/system_monitor.h"
+#include "jni/SystemMonitor_jni.h"
 
 namespace base {
 
+namespace android {
+
+// Native implementation of SystemMonitor.java.
+void OnBatteryChargingChanged(JNIEnv* env,
+                              jclass clazz) {
+  SystemMonitor::Get()->ProcessPowerMessage(SystemMonitor::POWER_STATE_EVENT);
+}
+
+}  // namespace android
+
 bool SystemMonitor::IsBatteryPower() {
-  NOTIMPLEMENTED();
-  return true;
+  JNIEnv* env = base::android::AttachCurrentThread();
+  return base::android::Java_SystemMonitor_isBatteryPower(env);
+}
+
+bool RegisterSystemMonitor(JNIEnv* env) {
+  return base::android::RegisterNativesImpl(env);
 }
 
 }  // namespace base