Implement exponential back-off mechanism.

chrome_frame/metrics_service.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.
 
 
 //------------------------------------------------------------------------------
 // Description of the life cycle of a instance of MetricsService.
 //
 //  OVERVIEW
 //
@@ skipping 45 matching lines @@
 #include "base/file_version_info.h"
 #include "base/lock.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/thread.h"
 #include "base/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/net/url_fetcher.h"
-#include "chrome/common/net/url_fetcher_protect.h"
 #include "chrome/common/net/url_request_context_getter.h"
 #include "chrome/installer/util/browser_distribution.h"
 #include "chrome/installer/util/chrome_frame_distribution.h"
 #include "chrome/installer/util/google_update_settings.h"
 #include "chrome_frame/bind_status_callback_impl.h"
 #include "chrome_frame/chrome_frame_delegate.h"
 #include "chrome_frame/crash_reporting/crash_metrics.h"
 #include "chrome_frame/html_utils.h"
 #include "chrome_frame/http_negotiate.h"
 #include "chrome_frame/utils.h"
@@ skipping 522 matching lines @@
     version += "-F";
     if (!version_info.IsOfficialBuild())
       version.append("-devel");
     return version;
   } else {
     NOTREACHED() << "Unable to retrieve version string.";
   }
 
   return std::string();
 }