Added code so renderer would cleanly exit.

chrome/renderer/chrome_render_process_observer.cc

Index: chrome/renderer/chrome_render_process_observer.cc
diff --git a/chrome/renderer/chrome_render_process_observer.cc b/chrome/renderer/chrome_render_process_observer.cc
index 2ec16ddfbab72a90dcb2af29426e3b3117582f8f..b25a56ea7b465b70f280a9ce4a1ac9a0665f8cb3 100644
--- a/chrome/renderer/chrome_render_process_observer.cc
+++ b/chrome/renderer/chrome_render_process_observer.cc
@@ -162,7 +162,11 @@ class SuicideOnChannelErrorFilter : public IPC::ChannelProxy::MessageFilter {
     // So, we install a filter on the channel so that we can process this event
     // here and kill the process.
 
-    _exit(0);
+    if (CommandLine::ForCurrentProcess()->
+        HasSwitch(switches::kEnableRendererCleanExit))
+      alarm(30);

[Markus (顧孟勤), 2012/04/06 21:41:59]

I think I mentioned this before. A comment would be great. It's not entirely
obvious to a casual reader that we are relying on the fact that SIGALRM has a
default disposition of terminating the application.

In fact, if we wanted to be thorough, we'd reset things to SIG_DFL.

[asharif1, 2012/04/09 23:26:35]

Done.

+    else
+      _exit(0);
   }
 };
 #endif  // OS_POSIX