Adding about:flags option to enable guest mode.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index be29824da375ae8f22f293a9084444bc2566d848..a8e1be2aa278255ca6145d43ced025e6b1454c68 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1335,6 +1335,9 @@ const char kUserDataDir[]                   = "user-data-dir";
 // Uses the GAIA web-based signin flow instead of the native UI signin flow.
 const char kUseWebBasedSigninFlow[]         = "use-web-based-signin-flow";
 
+// Enables desktop guest mode.
+const char kEnableDesktopGuestMode[]        = "enable-desktop-guest-mode";

[Roger Tawa OOO till Jul 10th, 2012/12/03 15:57:42]

Match header file order.

[jwd, 2012/12/03 17:40:32]

Done.

+
 // Specifies a custom URL for the server which reports variation data to the
 // client. See variations_service.cc.
 const char kVariationsServerURL[]            = "variations-server-url";