Adds UMA for PrerenderingOffliner request processing result status.

chrome/browser/android/offline_pages/prerendering_offliner.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 "chrome/browser/android/offline_pages/prerendering_offliner.h"
 
 #include "base/bind.h"
 #include "chrome/browser/android/offline_pages/offline_page_mhtml_archiver.h"
 #include "components/offline_pages/background/save_page_request.h"
 #include "components/offline_pages/offline_page_model.h"
@@ skipping 79 matching lines @@
   pending_request_.reset(nullptr);
   GetOrCreateLoader()->StopLoading();
 
   // Determine status and run the completion callback.
   Offliner::RequestStatus save_status;
   if (save_result == SavePageResult::SUCCESS) {
     save_status = RequestStatus::SAVED;
   } else {
     // TODO(dougarnett): Consider reflecting some recommendation to retry the
     // request based on specific save error cases.
-    save_status = RequestStatus::FAILED_SAVE;
+    save_status = RequestStatus::SAVE_FAILED;
   }
   completion_callback.Run(request, save_status);
 }
 
 bool PrerenderingOffliner::LoadAndSave(const SavePageRequest& request,
                                        const CompletionCallback& callback) {
   if (pending_request_) {
     DVLOG(1) << "Already have pending request";
     return false;
   }
@@ skipping 46 matching lines @@
 }
 
 PrerenderingLoader* PrerenderingOffliner::GetOrCreateLoader() {
   if (!loader_) {
     loader_.reset(new PrerenderingLoader(browser_context_));
   }
   return loader_.get();
 }
 
 }  // namespace offline_pages