Disarm StartupTimeBomb when it is deleted

chrome/browser/chrome_browser_main.h

Index: chrome/browser/chrome_browser_main.h
===================================================================
--- chrome/browser/chrome_browser_main.h	(revision 111993)
+++ chrome/browser/chrome_browser_main.h	(working copy)
@@ -26,6 +26,7 @@
 class MetricsService;
 class PrefService;
 class Profile;
+class StartupTimeBomb;
 class ShutdownWatcherHelper;
 class TranslateManager;
 
@@ -138,6 +139,9 @@
   const CommandLine& parsed_command_line_;
   int result_code_;
 
+  // Create StartupTimeBomb object for watching jank during startup.
+  scoped_ptr<StartupTimeBomb> startup_watcher_;
+
   // Create ShutdownWatcherHelper object for watching jank during shutdown.
   // Please keep |shutdown_watcher| as the first object constructed, and hence
   // it is destroyed last.