Add NetworkChangeNotifier for Android.

net/android/network_change_notifier.cc

+// Copyright (c) 2012 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 "net/android/network_change_notifier.h"
+
+#include "base/logging.h"
+#include "base/android/jni_android.h"
+#include "jni/network_change_notifier_jni.h"
+
+namespace net {
+namespace android {
+
+NetworkChangeNotifier::NetworkChangeNotifier() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  CreateJavaObject(env);
+}
+
+NetworkChangeNotifier::~NetworkChangeNotifier() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_NetworkChangeNotifier_unregisterReceiver(
+      env, java_network_change_notifier_.obj());
+}
+
+void NetworkChangeNotifier::CreateJavaObject(JNIEnv* env) {
+  java_network_change_notifier_.Reset(
+      Java_NetworkChangeNotifier_create(
+          env,
+          base::android::GetApplicationContext(),
+          reinterpret_cast<jint>(this)));
+}
+
+void NetworkChangeNotifier::NotifyObservers(JNIEnv* env, jobject obj) {
+  NotifyObserversOfOnlineStateChange();
+}
+
+bool NetworkChangeNotifier::IsCurrentlyOffline() const {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  return !Java_NetworkChangeNotifier_isConnected(
+      env, java_network_change_notifier_.obj());
+}
+
+// static
+bool NetworkChangeNotifier::Register(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace android
+}  // namespace net