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

chrome/browser/chrome_browser_main_posix.cc

Index: chrome/browser/chrome_browser_main_posix.cc
diff --git a/chrome/browser/chrome_browser_main_posix.cc b/chrome/browser/chrome_browser_main_posix.cc
index 67e2371e18b00a2d109dcb99894677ed9fc48e8a..8ef704f7036299350e3ac8478a714b1ec3e90b23 100644
--- a/chrome/browser/chrome_browser_main_posix.cc
+++ b/chrome/browser/chrome_browser_main_posix.cc
@@ -140,7 +140,7 @@ void ShutdownDetector::ThreadMain() {
   // 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)) {