ChromeOs: Call BrowserList::SessionEnding when shutting down via SIGTERM

chrome/browser/browser_main_posix.cc

Index: chrome/browser/browser_main_posix.cc
diff --git a/chrome/browser/browser_main_posix.cc b/chrome/browser/browser_main_posix.cc
index 42dde452b282cc77a80db3bb36727a331be355aa..be383f3e63af166c386c3a47b331762caa441529 100644
--- a/chrome/browser/browser_main_posix.cc
+++ b/chrome/browser/browser_main_posix.cc
@@ -135,8 +135,8 @@ void ShutdownDetector::ThreadMain() {
   } 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.
-  Task* task = NewRunnableFunction(BrowserList::ExitCleanly);
+  // On ChromeOS, exiting on signal means END_SESSION.
+  Task* task = NewRunnableFunction(BrowserList::SessionEnding);
 #else
   Task* task = NewRunnableFunction(BrowserList::AttemptExit);
 #endif