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

net/nqe/network_quality_estimator.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.
 
 #ifndef NET_NQE_NETWORK_QUALITY_ESTIMATOR_H_
 #define NET_NQE_NETWORK_QUALITY_ESTIMATOR_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 102 matching lines @@
         NetworkQualityObservationSource source) = 0;
 
    protected:
     ThroughputObserver() {}
     virtual ~ThroughputObserver() {}
 
    private:
     DISALLOW_COPY_AND_ASSIGN(ThroughputObserver);
   };
 
+  // Provides simple interface to obtain the effective connection type.
+  class NET_EXPORT NetworkQualityProvider {
+   public:
+    // Returns the current effective connection type.
+    virtual EffectiveConnectionType GetEffectiveConnectionType() const = 0;
+
+    virtual ~NetworkQualityProvider() {}
+
+   protected:
+    NetworkQualityProvider() {}
+
+   private:
+    DISALLOW_COPY_AND_ASSIGN(NetworkQualityProvider);
+  };
+
   // Creates a new NetworkQualityEstimator.
   // |variation_params| is the map containing all field trial parameters
   // related to NetworkQualityEstimator field trial.
   // |external_estimates_provider| may be NULL.
   NetworkQualityEstimator(
       std::unique_ptr<ExternalEstimateProvider> external_estimates_provider,
       const std::map<std::string, std::string>& variation_params);
 
   // Construct a NetworkQualityEstimator instance allowing for test
   // configuration. Registers for network type change notifications so estimates
@@ skipping 495 matching lines @@
   base::ThreadChecker thread_checker_;
 
   base::WeakPtrFactory<NetworkQualityEstimator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkQualityEstimator);
 };
 
 }  // namespace net
 
 #endif  // NET_NQE_NETWORK_QUALITY_ESTIMATOR_H_