In Canary, crash the browser if shutdown takes longer 45 secs

chrome/browser/browser_main.cc

 // Copyright (c) 2011 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/browser_main.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 2094 matching lines @@
         translate_manager->FetchLanguageListFromTranslateServer(user_prefs);
       }
 #endif
 
       RunUIMessageLoop(browser_process.get());
     }
   }
 
   // Start watching for jank during shutdown. It gets disarmed when
   // |shutdown_watcher| object is destructed.
-  shutdown_watcher.Arm(base::TimeDelta::FromSeconds(25));
+  shutdown_watcher.Arm(base::TimeDelta::FromSeconds(45));
 
 #if defined(OS_WIN)
   // If it's the first run, log the search engine chosen.  We wait until
   // shutdown because otherwise we can't be sure the user has finished
   // selecting a search engine through the dialog reached from the first run
   // bubble link.
   if (record_search_engine) {
     TemplateURLService* url_service =
         TemplateURLServiceFactory::GetForProfile(profile);
     const TemplateURL* default_search_engine =
@@ skipping 90 matching lines @@
   if (env->GetVar(chrome::kPreReadEnvironmentVariable, &pre_read) &&
       (pre_read == "0" || pre_read == "1")) {
     std::string uma_name(name);
     uma_name += "_PreRead";
     uma_name += pre_read == "1" ? "Enabled" : "Disabled";
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 #endif
 }