Cleanup: Remove VersionUpdater::RelaunchBrowser interface method.

chrome/browser/lifetime/application_lifetime.cc

Index: chrome/browser/lifetime/application_lifetime.cc
diff --git a/chrome/browser/lifetime/application_lifetime.cc b/chrome/browser/lifetime/application_lifetime.cc
index 8c6adaebb8fdeafad4431f446d61f7cfd0e5d644..653f3dde8829497f6e5285446986ced313688b10 100644
--- a/chrome/browser/lifetime/application_lifetime.cc
+++ b/chrome/browser/lifetime/application_lifetime.cc
@@ -212,6 +212,14 @@ void AttemptRestart() {
 }
 #endif
 
+void AttemptRelaunch() {
+#if defined(OS_CHROMEOS)

[Lei Zhang, 2016/06/09 00:50:40]

UpdateRecommendedMessageBox::Accept() is another place that calls these two
functions, but it differs. Maybe that version makes more sense?

[dpapad, 2016/06/09 01:14:27]

Done, changed this to use UpdateRecommendedMessageBox's version. Also updated
UpdateRecommendedMessageBox to call chrome::AttemptRelaunch().

+  chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->RequestRestart();
+#else
+  chrome::AttemptRestart();
+#endif
+}
+
 void AttemptExit() {
 #if defined(OS_CHROMEOS)
   // On ChromeOS, user exit and system exits are the same.