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

chrome/browser/metrics/thread_watcher.cc

Index: chrome/browser/metrics/thread_watcher.cc
===================================================================
--- chrome/browser/metrics/thread_watcher.cc	(revision 99768)
+++ chrome/browser/metrics/thread_watcher.cc	(working copy)
@@ -727,6 +727,14 @@
 
 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();
 }