Revert "Populate EEP estimate in NQE"

net/base/external_estimate_provider.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_BASE_EXTERNAL_ESTIMATE_PROVIDER_H_
 #define NET_BASE_EXTERNAL_ESTIMATE_PROVIDER_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 41 matching lines @@
   // Returns true if the time since network quality was last updated is
   // available, and sets |time_since_last_update| to that value.
   virtual bool GetTimeSinceLastUpdate(
       base::TimeDelta* time_since_last_update) const = 0;
 
   // Sets delegate that is notified when an updated estimate is available.
   // |delegate| should outlive |ExternalEstimateProvider|.
   virtual void SetUpdatedEstimateDelegate(
       UpdatedEstimateDelegate* delegate) = 0;
 
-  // Requests an updated network quality estimate from the external estimate
-  // provider.
-  virtual void Update() const = 0;
-
  private:
   DISALLOW_COPY_AND_ASSIGN(ExternalEstimateProvider);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_EXTERNAL_ESTIMATE_PROVIDER_H_