Relanding this as this did not fix the chromiumos breakage.

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 203 matching lines @@
 extern const char kHstsHosts[];
 extern const char kIgnoreGpuBlacklist[];
 extern const char kImport[];
 extern const char kImportFromFile[];
 extern const char kIncognito[];
 extern const char kInstantURL[];
 extern const char kKeepAliveForTest[];
 extern const char kKioskMode[];
 extern const char kKioskModePrinting[];
 extern const char kLoadComponentExtension[];
+extern const char kLoadCloudPolicyOnSignin[];
 extern const char kLoadExtension[];
 extern const char kLoadOpencryptoki[];
 extern const char kUninstallExtension[];
 extern const char kLogNetLog[];
 extern const char kMakeDefaultBrowser[];
 extern const char kManaged[];
 extern const char kMediaCacheSize[];
 extern const char kMemoryProfiling[];
 extern const char kMessageLoopHistogrammer[];
 extern const char kMetricsRecordingOnly[];
@@ skipping 208 matching lines @@
 #else
 extern const char kEnablePrintPreview[];
 #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_