UMA: How often are different network error screens encountered during OOBE

chrome/browser/chromeos/login/screens/error_screen.h

Index: chrome/browser/chromeos/login/screens/error_screen.h
diff --git a/chrome/browser/chromeos/login/screens/error_screen.h b/chrome/browser/chromeos/login/screens/error_screen.h
index ecc7531aabae58d61afe1ac64c47cc328654cd5e..a98faf037bc75bca8bd705cebe74085ff58c9f60 100644
--- a/chrome/browser/chromeos/login/screens/error_screen.h
+++ b/chrome/browser/chromeos/login/screens/error_screen.h
@@ -36,13 +36,16 @@ class ErrorScreen : public WizardScreen,
   };
 
   enum ErrorState {
-    ERROR_STATE_UNKNOWN = 0,
+    ERROR_STATE_NONE = 0,
     ERROR_STATE_PORTAL,
     ERROR_STATE_OFFLINE,
     ERROR_STATE_PROXY,
     ERROR_STATE_AUTH_EXT_TIMEOUT,
-    ERROR_STATE_KIOSK_ONLINE
+    // States above are being logged to histograms.
+    ERROR_STATE_KIOSK_ONLINE,
+    ERROR_STATE_UNKNOWN
   };
+  static const int kHistogramErrorStateNum = 5;
 
   ErrorScreen(ScreenObserver* screen_observer, ErrorScreenActor* actor);
   virtual ~ErrorScreen();
@@ -86,6 +89,8 @@ class ErrorScreen : public WizardScreen,
   // |error_state|, and |network|.
   void SetErrorState(ErrorState error_state, const std::string& network);
 
+  ErrorState GetErrorState() const;
+
   // Toggles the guest sign-in prompt.
   void AllowGuestSignin(bool allow);