Added UI to enable debugging features on CrOS

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index c6b3a5af079ac87cbb70396f3014fb93b945d1bc..036c90e5cb4f464bc44bae91e88b577a369366d4 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -241,6 +241,10 @@ const char kSmsTestMessages[] = "sms-test-messages";
 // This option is for testing the chromeos build of chrome on the desktop only.
 const char kStubCrosSettings[] = "stub-cros-settings";
 
+// Indicates that the system is running in dev mode. The dev mode probing is
+// done by session manager.
+const char kSystemDevMode[] = "system-developer-mode";
+
 // Enables animated transitions during first-run tutorial.
 const char kEnableFirstRunUITransitions[] = "enable-first-run-ui-transitions";