chromeos: Notify window manager about signout.

chrome/browser/browser_shutdown.cc

Index: chrome/browser/browser_shutdown.cc
diff --git a/chrome/browser/browser_shutdown.cc b/chrome/browser/browser_shutdown.cc
index a3125231eb51a4a2fcbbf340650406be4affab01..67f5b9df0c1af05692badd59a33936dc07e81427 100644
--- a/chrome/browser/browser_shutdown.cc
+++ b/chrome/browser/browser_shutdown.cc
@@ -48,6 +48,7 @@
 #include "chrome/browser/chromeos/boot_times_loader.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/login_library.h"
+#include "chrome/browser/chromeos/wm_ipc.h"
 #endif
 
 using base::Time;
@@ -251,6 +252,7 @@ void Shutdown() {
   UnregisterURLRequestChromeJob();
 
 #if defined(OS_CHROMEOS)
+  chromeos::WmIpc::instance()->NotifyAboutSignout();
   if (chromeos::CrosLibrary::Get()->EnsureLoaded()) {
     chromeos::CrosLibrary::Get()->GetLoginLibrary()->StopSession("");
   }