Move the window destruction and registration out of cleanup and into BrowserProcessImpl::EndSession…

chrome/browser/process_singleton_win.cc

Index: chrome/browser/process_singleton_win.cc
===================================================================
--- chrome/browser/process_singleton_win.cc	(revision 141718)
+++ chrome/browser/process_singleton_win.cc	(working copy)
@@ -302,12 +302,11 @@
 }
 
 void ProcessSingleton::Cleanup() {
+}
+
+void ProcessSingleton::UnregisterWindowClass() {
   // Window classes registered by DLLs are not cleaned up automatically on
   // process exit, so we must unregister at the earliest chance possible.
-  // During the fast shutdown sequence, ProcessSingleton::Cleanup() is
-  // called if our process was the first to start.  Therefore we try cleaning
-  // up here, and again in the destructor if needed to catch as many cases
-  // as possible.
   if (window_) {
     ::DestroyWindow(window_);
     ::UnregisterClass(chrome::kMessageWindowClass,