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

chrome/browser/metrics/thread_watcher.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/metrics/thread_watcher.h"
 
 #include <math.h>  // ceil
 
 #include "base/debug/alias.h"
 #include "base/string_tokenizer.h"
@@ skipping 716 matching lines @@
 
 void ShutdownWatcherHelper::Arm(const base::TimeDelta& duration) {
   DCHECK(!shutdown_watchdog_);
   base::TimeDelta actual_duration = duration;
   chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
   if (channel == chrome::VersionInfo::CHANNEL_STABLE) {
     actual_duration *= 50;
   } else if (channel == chrome::VersionInfo::CHANNEL_BETA ||
              channel == chrome::VersionInfo::CHANNEL_DEV) {
     actual_duration *= 25;
+  } else {
+    // In Canary, for Windows XP, give twice the time for shutdown.
+#if defined(OS_WIN)
+    if (base::win::GetVersion() <= base::win::VERSION_XP)
+      actual_duration *= 2;
+#endif
   }
   shutdown_watchdog_ = new ShutdownWatchDogThread(actual_duration);
   shutdown_watchdog_->Arm();
 }