Remove unnecessary #includes in update_screen.cc.

After the landing https://codereview.chromium.org/212303003,
update_screen.cc doesn't need the command line switch related
headers anymore. So we can remove these.

BUG=349033

Review URL: https://codereview.chromium.org/334403002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278208 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/login/screens/update_screen.cc

@@ -7,7 +7,6 @@
 #include <algorithm>
 
 #include "base/bind.h"
-#include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
@@ -17,7 +16,6 @@
 #include "chrome/browser/chromeos/login/screens/update_screen_actor.h"
 #include "chrome/browser/chromeos/login/startup_utils.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
-#include "chromeos/chromeos_switches.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/network/network_state.h"
 #include "content/public/browser/browser_thread.h"