Revert of [BackgroundSync] Trigger Background Sync events when Chrome is backgrounded on Android

content/browser/android/background_sync_network_observer_android.cc

-// Copyright 2015 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 "content/browser/android/background_sync_network_observer_android.h"
-
-#include "jni/BackgroundSyncNetworkObserver_jni.h"
-
-namespace content {
-
-// static
-bool BackgroundSyncNetworkObserverAndroid::Observer::RegisterNetworkObserver(
-    JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
-// static
-scoped_refptr<BackgroundSyncNetworkObserverAndroid::Observer>
-BackgroundSyncNetworkObserverAndroid::Observer::Create(
-    base::Callback<void(net::NetworkChangeNotifier::ConnectionType)> callback) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  scoped_refptr<BackgroundSyncNetworkObserverAndroid::Observer> observer(
-      new BackgroundSyncNetworkObserverAndroid::Observer(callback));
-  BrowserThread::PostTask(
-      BrowserThread::UI, FROM_HERE,
-      base::Bind(&BackgroundSyncNetworkObserverAndroid::Observer::Init,
-                 observer));
-  return observer;
-}
-
-void BackgroundSyncNetworkObserverAndroid::Observer::Init() {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  // Attach a Java BackgroundSyncNetworkObserver object. Its lifetime will be
-  // scoped to the lifetime of this object.
-  JNIEnv* env = base::android::AttachCurrentThread();
-  base::android::ScopedJavaGlobalRef<jobject> obj(
-      Java_BackgroundSyncNetworkObserver_createObserver(
-          env, base::android::GetApplicationContext(),
-          reinterpret_cast<jlong>(this)));
-  j_observer_.Reset(obj);
-}
-
-BackgroundSyncNetworkObserverAndroid::Observer::~Observer() {
-  JNIEnv* env = base::android::AttachCurrentThread();
-  Java_BackgroundSyncNetworkObserver_removeObserver(
-      env, j_observer_.obj(), reinterpret_cast<jlong>(this));
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  j_observer_.Release();
-}
-
-void BackgroundSyncNetworkObserverAndroid::Observer::
-    NotifyConnectionTypeChanged(JNIEnv* env,
-                                jobject jcaller,
-                                jint new_connection_type) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  BrowserThread::PostTask(
-      BrowserThread::IO, FROM_HERE,
-      base::Bind(callback_,
-                 static_cast<net::NetworkChangeNotifier::ConnectionType>(
-                     new_connection_type)));
-}
-
-BackgroundSyncNetworkObserverAndroid::Observer::Observer(
-    base::Callback<void(net::NetworkChangeNotifier::ConnectionType)> callback)
-    : callback_(callback) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-}
-
-BackgroundSyncNetworkObserverAndroid::BackgroundSyncNetworkObserverAndroid(
-    const base::Closure& network_changed_callback)
-    : BackgroundSyncNetworkObserver(network_changed_callback),
-      weak_ptr_factory_(this) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-
-  // Remove the observer attached by the NetworkObserver constructor
-  net::NetworkChangeNotifier::RemoveNetworkChangeObserver(this);
-
-  observer_ = Observer::Create(
-      base::Bind(&BackgroundSyncNetworkObserverAndroid::OnNetworkChanged,
-                 weak_ptr_factory_.GetWeakPtr()));
-}
-
-BackgroundSyncNetworkObserverAndroid::~BackgroundSyncNetworkObserverAndroid() {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-}
-}  // namespace content