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

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h

 // Copyright (c) 2013 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_SIGNIN_SCREEN_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_SIGNIN_SCREEN_HANDLER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 29 matching lines @@
 namespace base {
 class DictionaryValue;
 class ListValue;
 }
 
 namespace chromeos {
 
 class AuthenticatedUserEmailRetriever;
 class CaptivePortalWindowProxy;
 class CoreOobeActor;
+class ErrorScreensHistogramHelper;
 class GaiaScreenHandler;
 class NativeWindowDelegate;
 class SupervisedUserCreationScreenHandler;
 class User;
 class UserContext;
 
 // Helper class to pass initial parameters to the login screen.
 class LoginScreenContext {
  public:
   LoginScreenContext();
@@ skipping 462 matching lines @@
 
   // Input Method Engine state used at signin screen.
   scoped_refptr<input_method::InputMethodManager::State> ime_state_;
 
   // This callback captures "focusPod finished" event for tests.
   base::Closure test_focus_pod_callback_;
 
   // True if SigninScreenHandler has already been added to OobeUI observers.
   bool oobe_ui_observer_added_;
 
+  scoped_ptr<ErrorScreensHistogramHelper> histogram_helper_;
+
   base::WeakPtrFactory<SigninScreenHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninScreenHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_SIGNIN_SCREEN_HANDLER_H_