Implement exponential back-off mechanism.

chrome/service/cloud_print/job_status_updater.cc

 // Copyright (c) 2010 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/service/cloud_print/job_status_updater.h"
 
 #include "base/json/json_reader.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/common/net/http_return.h"
@@ skipping 44 matching lines @@
         last_job_details_.Clear();
         last_job_details_.status = cloud_print::PRINT_JOB_STATUS_COMPLETED;
         need_update = true;
       }
     }
     if (need_update) {
       request_ = new CloudPrintURLFetcher;
       request_->StartGetRequest(
           CloudPrintHelpers::GetUrlForJobStatusUpdate(
               cloud_print_server_url_, job_id_, last_job_details_),
-          this, auth_token_, kCloudPrintAPIRetryPolicy);
+          this, auth_token_, kCloudPrintAPIMaxRetryCount);
     }
   }
 }
 
 void JobStatusUpdater::Stop() {
   request_ = NULL;
   DCHECK(delegate_);
   stopped_ = true;
   delegate_->OnJobCompleted(this);
 }
 
 // CloudPrintURLFetcher::Delegate implementation.
 CloudPrintURLFetcher::ResponseAction JobStatusUpdater::HandleJSONData(
       const URLFetcher* source,
       const GURL& url,
       DictionaryValue* json_data,
       bool succeeded) {
   if (last_job_details_.status == cloud_print::PRINT_JOB_STATUS_COMPLETED) {
     MessageLoop::current()->PostTask(
         FROM_HERE, NewRunnableMethod(this, &JobStatusUpdater::Stop));
   }
   return CloudPrintURLFetcher::STOP_PROCESSING;
 }
 
 void JobStatusUpdater::OnRequestAuthError() {
   if (delegate_)
     delegate_->OnAuthError();
 }