Network connectivity errors handling (incl. CP) for enrollment flow

chrome/browser/chromeos/login/ui/webui_login_view.h

Index: chrome/browser/chromeos/login/ui/webui_login_view.h
diff --git a/chrome/browser/chromeos/login/ui/webui_login_view.h b/chrome/browser/chromeos/login/ui/webui_login_view.h
index 28a3277e87b962228d5829416c412eb6c42ac2f9..c545c7eb8a21d2b89f44d6c3bf67af2847bff849 100644
--- a/chrome/browser/chromeos/login/ui/webui_login_view.h
+++ b/chrome/browser/chromeos/login/ui/webui_login_view.h
@@ -44,6 +44,12 @@ class WebUILoginView : public views::View,
                        public ChromeWebModalDialogManagerDelegate,
                        public web_modal::WebContentsModalDialogHost {
  public:
+  class FrameObserver {
+   public:
+    // Called when a frame failed to load.
+    virtual void OnFrameError(const std::string& frame_unique_name) = 0;
+  };
+
   // Internal class name.
   static const char kViewClassName[];
 
@@ -105,6 +111,9 @@ class WebUILoginView : public views::View,
     should_emit_login_prompt_visible_ = emit;
   }
 
+  void AddFrameObserver(FrameObserver* frame_observer);
+  void RemoveFrameObserver(FrameObserver* frame_observer);
+
  protected:
   // Overridden from views::View:
   virtual void Layout() OVERRIDE;
@@ -183,6 +192,7 @@ class WebUILoginView : public views::View,
   scoped_ptr<ScopedGaiaAuthExtension> auth_extension_;
 
   ObserverList<web_modal::ModalDialogHostObserver> observer_list_;
+  ObserverList<FrameObserver> frame_observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(WebUILoginView);
 };