Store the "browser autorestarted, last session must be restored" information in a preference.

chrome/browser/chrome_browser_main_posix.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/chrome_browser_main_posix.h"
 
 #include <errno.h>
 #include <limits.h>
 #include <signal.h>
 #include <sys/resource.h>
@@ skipping 122 matching lines @@
       ShutdownFDClosedError();
       break;
     }
     bytes_read += ret;
   } while (bytes_read < sizeof(signal));
   VLOG(1) << "Handling shutdown for signal " << signal << ".";
 #if defined(OS_CHROMEOS)
   // On ChromeOS, exiting on signal should be always clean.
   base::Closure task = base::Bind(&BrowserList::ExitCleanly);
 #else
-  base::Closure task = base::Bind(&BrowserList::AttemptExit);
+  base::Closure task = base::Bind(&BrowserList::AttemptExit, false);
 #endif
 
   if (!BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, task)) {
     // Without a UI thread to post the exit task to, there aren't many
     // options.  Raise the signal again.  The default handler will pick it up
     // and cause an ungraceful exit.
     RAW_LOG(WARNING, "No UI thread, exiting ungracefully.");
     kill(getpid(), signal);
 
     // The signal may be handled on another thread.  Give that a chance to
@@ skipping 106 matching lines @@
   // And SIGHUP, for when the terminal disappears. On shutdown, many Linux
   // distros send SIGHUP, SIGTERM, and then SIGKILL.
   action.sa_handler = SIGHUPHandler;
   CHECK(sigaction(SIGHUP, &action, NULL) == 0);
 
 #if defined(TOOLKIT_USES_GTK) && !defined(OS_CHROMEOS)
   printing::PrintingContextGtk::SetCreatePrintDialogFunction(
       &PrintDialogGtk::CreatePrintDialog);
 #endif
 }