Implement exponential back-off mechanism and enforce it at the URLRequestHttpJob level.

chrome/browser/google/google_url_tracker.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/browser/google/google_url_tracker.h"
 
 #include <vector>
 
 #include "app/l10n_util.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/browser/tab_contents/infobar_delegate.h"
 #include "chrome/browser/tab_contents/navigation_controller.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/common/chrome_switches.h"
-#include "chrome/common/net/url_fetcher_protect.h"
 #include "chrome/common/notification_service.h"
 #include "chrome/common/pref_names.h"
 #include "grit/generated_resources.h"
 #include "net/base/load_flags.h"
 #include "net/url_request/url_request_status.h"
 
 const char GoogleURLTracker::kDefaultGoogleHomepage[] =
     "http://www.google.com/";
 const char GoogleURLTracker::kSearchDomainCheckURL[] =
     "https://www.google.com/searchdomaincheck?format=domain&type=chrome";
@@ skipping 76 matching lines @@
       request_context_available_(!!Profile::GetDefaultRequestContext()),
       need_to_prompt_(false),
       controller_(NULL),
       infobar_factory_(new InfoBarDelegateFactory),
       infobar_(NULL) {
   registrar_.Add(this, NotificationType::DEFAULT_REQUEST_CONTEXT_AVAILABLE,
                  NotificationService::AllSources());
 
   net::NetworkChangeNotifier::AddObserver(this);
 
-  // Configure to max_retries at most kMaxRetries times for 5xx errors.
-  URLFetcherProtectEntry* protect =
-      URLFetcherProtectManager::GetInstance()->Register(
-          GURL(kSearchDomainCheckURL).host());
-  static const int kMaxRetries = 5;
-  protect->SetMaxRetries(kMaxRetries);
-
   // Because this function can be called during startup, when kicking off a URL
   // fetch can eat up 20 ms of time, we delay five seconds, which is hopefully
   // long enough to be after startup, but still get results back quickly.
   // Ideally, instead of this timer, we'd do something like "check if the
   // browser is starting up, and if so, come back later", but there is currently
   // no function to do this.
   static const int kStartFetchDelayMS = 5000;
   MessageLoop::current()->PostDelayedTask(FROM_HERE,
       runnable_method_factory_.NewRunnableMethod(
           &GoogleURLTracker::FinishSleep),
@@ skipping 61 matching lines @@
   already_fetched_ = true;
   fetcher_.reset(URLFetcher::Create(fetcher_id_, GURL(kSearchDomainCheckURL),
                                     URLFetcher::GET, this));
   ++fetcher_id_;
   // We don't want this fetch to affect existing state in the profile.  For
   // example, if a user has no Google cookies, this automatic check should not
   // cause one to be set, lest we alarm the user.
   fetcher_->set_load_flags(net::LOAD_DISABLE_CACHE |
                            net::LOAD_DO_NOT_SAVE_COOKIES);
   fetcher_->set_request_context(Profile::GetDefaultRequestContext());
+
+  // Configure to max_retries at most kMaxRetries times for 5xx errors.
+  static const int kMaxRetries = 5;
+  fetcher_->set_max_retries(kMaxRetries);
+
   fetcher_->Start();
 }
 
 void GoogleURLTracker::OnURLFetchComplete(const URLFetcher* source,
                                           const GURL& url,
                                           const URLRequestStatus& status,
                                           int response_code,
                                           const ResponseCookies& cookies,
                                           const std::string& data) {
   // Delete the fetcher on this function's exit.
@@ skipping 138 matching lines @@
     TabContents* tab_contents) {
   if (!need_to_prompt_)
     return;
   DCHECK(!fetched_google_url_.is_empty());
   DCHECK(infobar_factory_.get());
 
   infobar_ = infobar_factory_->CreateInfoBar(tab_contents,
                                              this,
                                              fetched_google_url_);
 }