[OS X] Wire up --use-mock-keychain command line flag to encryptor module

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 429 matching lines @@
 extern const char kMigrateDataDirForSxS[];
 #endif
 
 #if defined(OS_MACOSX)
 extern const char kDisableAppShims[];
 extern const char kDisableCoreAnimationLayerSquashing[];
 extern const char kDisableSystemFullscreenForTesting[];
 extern const char kEnableSimplifiedFullscreen[];
 extern const char kKeychainReauthorize[];
 extern const char kRelauncherProcess[];
-extern const char kUseMockKeychain[];
 #endif
 
 #if defined(OS_WIN)
 extern const char kDebugPrint[];
 extern const char kEnableProfileShortcutManager[];
 extern const char kForceImmersive[];
 extern const char kForceDesktop[];
 extern const char kPrintRaster[];
 extern const char kRelaunchShortcut[];
 extern const char kViewerConnect[];
@@ skipping 12 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_