[Chromecast] Add proxy server support to chromecast

chromecast/net/fake_connectivity_checker.h

 // 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 "base/macros.h"
 #include "chromecast/net/connectivity_checker.h"
 
 namespace chromecast {
 
 // A simple fake connectivity checker for testing. Will appeared to be
 // connected by default.
 class FakeConnectivityChecker : public ConnectivityChecker {
  public:
   FakeConnectivityChecker();
 
   // ConnectivityChecker implementation:
   bool Connected() const override;
   void Check() override;
 
   // Sets connectivity and notifies observers if it has changed.
   void SetConnectedForTest(bool connected);
+  void DetachFromPrefService() override;
 
  protected:
   ~FakeConnectivityChecker() override;
 
  private:
   friend class base::RefCountedThreadSafe<FakeConnectivityChecker>;
   bool connected_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeConnectivityChecker);
 };
 
 }  // namespace chromecast