Added command line switches "crash-on-hang-threads" and "crash-on-hang-seconds"

chrome/browser/metrics/thread_watcher_unittest.cc

Index: chrome/browser/metrics/thread_watcher_unittest.cc
===================================================================
--- chrome/browser/metrics/thread_watcher_unittest.cc	(revision 88502)
+++ chrome/browser/metrics/thread_watcher_unittest.cc	(working copy)
@@ -244,8 +244,10 @@
     io_thread_->Start();
     watchdog_thread_->Start();
 
+    CommandLine command_line(CommandLine::NO_PROGRAM);

[jar (doing other things), 2011/06/10 00:38:33]

Is there a nice way we can test this with some command line specified?  List a
thread?  See that the name was picked up?

[ramant (doing other things), 2011/06/13 03:26:02]

Done.

+
     // Setup the registry for thread watchers.
-    thread_watcher_list_ = new ThreadWatcherList();
+    thread_watcher_list_ = new ThreadWatcherList(command_line);
 
     // Create thread watcher object for the IO thread.
     io_watcher_ = new CustomThreadWatcher(io_thread_id, io_thread_name,