Revert of [Android WebView] Implement support for Network Information API and enable it.

android_webview/java/src/org/chromium/android_webview/AwNetworkChangeNotifierRegistrationPolicy.java

Index: android_webview/java/src/org/chromium/android_webview/AwNetworkChangeNotifierRegistrationPolicy.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwNetworkChangeNotifierRegistrationPolicy.java b/android_webview/java/src/org/chromium/android_webview/AwNetworkChangeNotifierRegistrationPolicy.java
deleted file mode 100644
index 798a9af2d784031c62069545beeb696238f80bc7..0000000000000000000000000000000000000000
--- a/android_webview/java/src/org/chromium/android_webview/AwNetworkChangeNotifierRegistrationPolicy.java
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2016 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.android_webview;
-
-import org.chromium.net.NetworkChangeNotifierAutoDetect;
-
-/**
- * Registration policy to make sure we only listen to network changes when
- * there are live webview instances.
- */
-public class AwNetworkChangeNotifierRegistrationPolicy
-        extends NetworkChangeNotifierAutoDetect.RegistrationPolicy
-        implements AwContentsLifecycleNotifier.Observer {
-
-    @Override
-    protected void init(NetworkChangeNotifierAutoDetect notifier) {
-        super.init(notifier);
-        AwContentsLifecycleNotifier.addObserver(this);
-    }
-
-    protected void destroy() {
-        AwContentsLifecycleNotifier.removeObserver(this);
-    }
-
-    // AwContentsLifecycleNotifier.Observer
-    @Override
-    public void onFirstWebViewCreated() {
-        register();
-    }
-
-    @Override
-    public void onLastWebViewDestroyed() {
-        unregister();
-    }
-}