Show confirmation dialog for unsecure signin

chrome/browser/ui/webui/signin/inline_login_ui.h

 // Copyright 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_SIGNIN_INLINE_LOGIN_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_SIGNIN_INLINE_LOGIN_UI_H_
 
 #include "chrome/browser/extensions/signin/scoped_gaia_auth_extension.h"
 #include "ui/web_dialogs/web_dialog_ui.h"
 
+namespace content {
+class RenderFrameHost;
+}
+
 // Inline login WebUI in various signin flows for ChromeOS and Chrome desktop.
 // The authentication is carried out via the host gaia_auth extension. Upon
 // success, the profile of the webui should be populated with proper cookies.
 // Then this UI would fetch the oauth2 tokens using the cookies.
 class InlineLoginUI : public ui::WebDialogUI {
  public:
   explicit InlineLoginUI(content::WebUI* web_ui);
   virtual ~InlineLoginUI();
 
+  // Gets the iframe within an auth page that has the specified parent origin
+  // if |parent_origin| is not empty, and the specified parent frame name.
+  static content::RenderFrameHost* GetAuthIframe(
+      content::WebContents* web_contents,
+      const GURL& parent_origin,
+      const std::string& parent_frame_name);
  private:
   ScopedGaiaAuthExtension auth_extension_;
 
   DISALLOW_COPY_AND_ASSIGN(InlineLoginUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SIGNIN_INLINE_LOGIN_UI_H_