[Chromecast] Add proxy server support to chromecast

chromecast/net/fake_connectivity_checker.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 "chromecast/net/fake_connectivity_checker.h"
 
 namespace chromecast {
 
 FakeConnectivityChecker::FakeConnectivityChecker()
     : ConnectivityChecker(),
       connected_(true) {
 }
 
 FakeConnectivityChecker::~FakeConnectivityChecker() {}
 
 bool FakeConnectivityChecker::Connected() const {
   return connected_;
 }
 
 void FakeConnectivityChecker::Check() {
 }
 
+void FakeConnectivityChecker::DetachFromPrefService() {}
+
 void FakeConnectivityChecker::SetConnectedForTest(bool connected) {
   if (connected_ == connected)
     return;
 
   connected_ = connected;
   Notify(connected);
 }
 
 }  // namespace chromecast