Remove support for special "sign in process" state.

chrome/common/chrome_switches.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Defines all the command-line switches used by Chrome.
 
 #ifndef CHROME_COMMON_CHROME_SWITCHES_H_
 #define CHROME_COMMON_CHROME_SWITCHES_H_
 
 #include "build/build_config.h"
@@ skipping 273 matching lines @@
 extern const char kServiceProcess[];
 extern const char kSilentDebuggerExtensionAPI[];
 extern const char kSilentLaunch[];
 extern const char kSetToken[];
 extern const char kShowAppList[];
 extern const char kShowIcons[];
 extern const char kShowSavedCopy[];
 extern const char kEnableShowSavedCopyPrimary[];
 extern const char kEnableShowSavedCopySecondary[];
 extern const char kDisableShowSavedCopy[];
-extern const char kSigninProcess[];
 extern const char kSimulateElevatedRecovery[];
 extern const char kSimulateUpgrade[];
 extern const char kSimulateCriticalUpdate[];
 extern const char kSimulateOutdated[];
 extern const char kSimulateOutdatedNoAU[];
 extern const char kSpeculativeResourcePrefetching[];
 extern const char kSpeculativeResourcePrefetchingDisabled[];
 extern const char kSpeculativeResourcePrefetchingEnabled[];
 extern const char kSpeculativeResourcePrefetchingLearning[];
 #if defined(ENABLE_SPELLCHECK)
@@ skipping 102 matching lines @@
 #if defined(OS_CHROMEOS)
 bool PowerOverlayEnabled();
 #endif
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in
 // alphabetical order, or in one of the ifdefs (also in order in each section).
 
 }  // namespace switches
 
 #endif  // CHROME_COMMON_CHROME_SWITCHES_H_