Remove base/win/metro.{cc|h} and some associated code

chrome/browser/lifetime/application_lifetime.h

Index: chrome/browser/lifetime/application_lifetime.h
diff --git a/chrome/browser/lifetime/application_lifetime.h b/chrome/browser/lifetime/application_lifetime.h
index 488f22c79a2dd08bf6a5ce158b16ccf34c3d474e..5d0989b8702ab57a8d1d6556327f7d051ff2a000 100644
--- a/chrome/browser/lifetime/application_lifetime.h
+++ b/chrome/browser/lifetime/application_lifetime.h
@@ -26,26 +26,6 @@ void AttemptUserExit();
 // manager re-launch the browser with restore last session flag.
 void AttemptRestart();
 
-#if defined(OS_WIN)
-enum AshExecutionStatus {
-  ASH_KEEP_RUNNING,
-  ASH_TERMINATE,
-};
-
-// Helper function to activate the desktop from Ash mode. The
-// |ash_execution_status| parameter indicates if we should exit Ash after
-// activating desktop.
-void ActivateDesktopHelper(AshExecutionStatus ash_execution_status);
-
-// Windows 7/8 specific: Like AttemptRestart but if chrome is running
-// in desktop mode it starts in metro mode and vice-versa. The switching like
-// the restarting is controlled by a preference.
-void AttemptRestartToDesktopMode();
-// Launches Chrome into Windows 8 metro mode on Windows 8. On Windows 7 it
-// launches Chrome into Windows ASH.
-void AttemptRestartToMetroMode();
-#endif
-
 // Attempt to exit by closing all browsers.  This is equivalent to
 // CloseAllBrowsers() on platforms where the application exits
 // when no more windows are remaining. On other platforms (the Mac),