Add UMA for network type at request start

components/offline_pages/core/background/request_coordinator.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 COMPONENTS_OFFLINE_PAGES_CORE_BACKGROUND_REQUEST_COORDINATOR_H_
 #define COMPONENTS_OFFLINE_PAGES_CORE_BACKGROUND_REQUEST_COORDINATOR_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 425 matching lines @@
   std::unique_ptr<OfflinerPolicy> policy_;
   // RequestQueue.  Used to store incoming requests. Owned.
   std::unique_ptr<RequestQueue> queue_;
   // Scheduler. Used to request a callback when network is available.  Owned.
   std::unique_ptr<Scheduler> scheduler_;
   // Controller of client policies. Owned.
   std::unique_ptr<ClientPolicyController> policy_controller_;
   // Unowned pointer to the Network Quality Estimator.
   net::NetworkQualityEstimator::NetworkQualityProvider*
       network_quality_estimator_;
+  net::EffectiveConnectionType network_quality_at_request_start_;
   // Holds an ID of the currently active request.
   int64_t active_request_id_;
   // Status of the most recent offlining.
   Offliner::RequestStatus last_offlining_status_;
   // A set of request_ids that we are holding off until the download manager is
   // done with them.
   std::set<int64_t> disabled_requests_;
   // The processing callback to call when processing the current processing
   // window stops. It is set from the Start*Processing() call that triggered
   // the processing or it may be the |internal_start_processing_callback_| if
@@ skipping 21 matching lines @@
   std::deque<int64_t> prioritized_requests_;
   // Allows us to pass a weak pointer to callbacks.
   base::WeakPtrFactory<RequestCoordinator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RequestCoordinator);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_CORE_BACKGROUND_REQUEST_COORDINATOR_H_