[Offline Pages] Adds UMA for number of started attempts and for network

components/offline_pages/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_BACKGROUND_REQUEST_COORDINATOR_H_
 #define COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_
 
 #include <memory>
 
 #include "base/callback.h"
@@ skipping 193 matching lines @@
   // Called by the offliner when an offlining request is completed. (and by
   // tests).
   void OfflinerDoneCallback(const SavePageRequest& request,
                             Offliner::RequestStatus status);
 
   void TryNextRequest();
 
   // If there is an active request in the list, cancel that request.
   bool CancelActiveRequestIfItMatches(const std::vector<int64_t>& request_ids);
 
+  // Records an aborted attempt for the request and update it in the queue
+  // (possibly removing it). Returns the updated copy.
+  void AbortRequestAttempt(SavePageRequest* request);
+
+  // Remove the attempted request from the queue with status to pass through to
+  // any observers and UMA histogram.
+  void RemoveAttemptedRequest(const SavePageRequest& request,
+                              SavePageStatus status);
+
   // Returns the appropriate offliner to use, getting a new one from the factory
   // if needed.
   void GetOffliner();
 
   // Method to wrap calls to getting the connection type so it can be
   // changed for tests.
   net::NetworkChangeNotifier::ConnectionType GetConnectionType();
 
   void SetNetworkConditionsForTest(
       net::NetworkChangeNotifier::ConnectionType connection) {
@@ skipping 52 matching lines @@
   base::TimeDelta offliner_timeout_;
   // 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_BACKGROUND_REQUEST_COORDINATOR_H_