In Dev and Beta, give 10 mins for shutdown and in

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 709 matching lines @@
 ShutdownWatcherHelper::~ShutdownWatcherHelper() {
   if (shutdown_watchdog_) {
     shutdown_watchdog_->Disarm();
     delete shutdown_watchdog_;
     shutdown_watchdog_ = NULL;
   }
 }
 
 void ShutdownWatcherHelper::Arm(const base::TimeDelta& duration) {
   DCHECK(!shutdown_watchdog_);
-  shutdown_watchdog_ = new ShutdownWatchDogThread(duration);
+  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;
+  }
+  shutdown_watchdog_ = new ShutdownWatchDogThread(actual_duration);
   shutdown_watchdog_->Arm();
 }