[OfflinePages, NetworkQualityEstimator] Use NetworkQualityEstimator to decide on triggering Backgro…

chrome/browser/net/nqe/ui_network_quality_estimator_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_NET_NQE_UI_NETWORK_QUALITY_ESTIMATOR_SERVICE_H_
 #define CHROME_BROWSER_NET_NQE_UI_NETWORK_QUALITY_ESTIMATOR_SERVICE_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "net/nqe/effective_connection_type.h"
+#include "net/nqe/network_quality_estimator.h"
 
 // UI service to determine the current EffectiveConnectionType.
-class UINetworkQualityEstimatorService : public KeyedService {
+class UINetworkQualityEstimatorService
+    : public KeyedService,
+      public net::NetworkQualityEstimator::NetworkQualityProvider {
  public:
   UINetworkQualityEstimatorService();
   ~UINetworkQualityEstimatorService() override;
 
   // The current EffectiveConnectionType.
-  net::EffectiveConnectionType GetEffectiveConnectionType() const;
+  net::EffectiveConnectionType GetEffectiveConnectionType() const override;
 
   // Tests can manually set EffectiveConnectionType, but browser tests should
   // expect that the EffectiveConnectionType could change.
   void SetEffectiveConnectionTypeForTesting(net::EffectiveConnectionType type);
 
  private:
   class IONetworkQualityObserver;
 
   // KeyedService implementation:
   void Shutdown() override;
@@ skipping 10 matching lines @@
   // IO thread based observer that is owned by this service. Created on the UI
   // thread, but used and deleted on the IO thread.
   IONetworkQualityObserver* io_observer_;
 
   base::WeakPtrFactory<UINetworkQualityEstimatorService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UINetworkQualityEstimatorService);
 };
 
 #endif  // CHROME_BROWSER_NET_NQE_UI_NETWORK_QUALITY_ESTIMATOR_SERVICE_H_