count timeout as a completed attempt.

components/offline_pages/background/request_coordinator.cc

 // 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.
 
 #include "components/offline_pages/background/request_coordinator.h"
 
 #include <limits>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 194 matching lines @@
     RequestQueue::GetRequestsResult result,
     std::vector<std::unique_ptr<SavePageRequest>> requests) {
   callback.Run(std::move(requests));
 }
 
 void RequestCoordinator::StopPrerendering(Offliner::RequestStatus stop_status) {
   if (offliner_ && is_busy_) {
     DCHECK(active_request_.get());
     offliner_->Cancel();
 
+    // If we timed out, let the offliner done callback handle it.
+    if (processing_state_ == ProcessingWindowState::IMMEDIATE_WINDOW &&
+        stop_status == Offliner::RequestStatus::REQUEST_COORDINATOR_TIMED_OUT)
+      return;
+
+    // Otherwise, this attempt never really had a chance to run, mark it
+    // aborted.
     AbortRequestAttempt(active_request_.get());
   }
 
   // Stopping offliner means it will not call callback so set last status.
   last_offlining_status_ = stop_status;
 
   if (active_request_) {
     event_logger_.RecordOfflinerResult(active_request_->client_id().name_space,
                                        last_offlining_status_,
                                        active_request_->request_id());
@@ skipping 589 matching lines @@
 
 ClientPolicyController* RequestCoordinator::GetPolicyController() {
   return policy_controller_.get();
 }
 
 void RequestCoordinator::Shutdown() {
   network_quality_estimator_ = nullptr;
 }
 
 }  // namespace offline_pages