Refactor net::BackoffEntry to not require subclassing

chrome/browser/chromeos/net/network_portal_detector_impl.h

 // Copyright (c) 2013 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_NET_NETWORK_PORTAL_DETECTOR_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_NET_NETWORK_PORTAL_DETECTOR_IMPL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 68 matching lines @@
   bool StartDetectionIfIdle() override;
   void SetStrategy(PortalDetectorStrategy::StrategyId id) override;
   void OnLockScreenRequest() override;
 
   // NetworkStateHandlerObserver implementation:
   void DefaultNetworkChanged(const NetworkState* network) override;
 
   // PortalDetectorStrategy::Delegate implementation:
   int NoResponseResultCount() override;
   base::TimeTicks AttemptStartTime() override;
-  base::TimeTicks GetCurrentTimeTicks() override;
+  base::TimeTicks NowTicks() override;
 
  private:
   friend class ::NetworkingConfigTest;
   friend class NetworkPortalDetectorImplTest;
   friend class NetworkPortalDetectorImplBrowserTest;
 
   struct DetectionAttemptCompletedReport {
     DetectionAttemptCompletedReport();
 
     DetectionAttemptCompletedReport(const std::string network_name,
@@ skipping 169 matching lines @@
   DetectionAttemptCompletedReport attempt_completed_report_;
 
   base::WeakPtrFactory<NetworkPortalDetectorImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkPortalDetectorImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_NET_NETWORK_PORTAL_DETECTOR_IMPL_H_