Add --use-more-webui runtime flag to toggle WebUI replacements for native dialogs.

chrome/browser/ui/webui/certificate_viewer.h

 // Copyright (c) 2011 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_CERTIFICATE_VIEWER_H_
 #define CHROME_BROWSER_UI_WEBUI_CERTIFICATE_VIEWER_H_
 #pragma once
 
 #include "base/values.h"
 #include "chrome/browser/ui/webui/html_dialog_ui.h"
 #include "net/base/x509_certificate.h"
 #include "ui/gfx/native_widget_types.h"
 
-// Displays the WebUI certificate viewer dialog for the passed in certificate.
+// Displays the native or WebUI certificate viewer dialog for the given
+// certificate.
 void ShowCertificateViewer(gfx::NativeWindow parent,
                            net::X509Certificate*);
 
 // Dialog for displaying detailed certificate information. This is used in linux
 // and chromeos builds to display detailed information in a floating dialog when
 // the user clicks on "Certificate Information" from the lock icon of a web site
 // or "View" from the Certificate Manager.
 class CertificateViewerDialog : private HtmlDialogUIDelegate {
  public:
   // Shows the certificate viewer dialog for the passed in certificate.
@@ skipping 67 matching lines @@
   // The parent window.
   gfx::NativeWindow parent_;
 
   // The certificate chain.
   net::X509Certificate::OSCertHandles cert_chain_;
 
   DISALLOW_COPY_AND_ASSIGN(CertificateViewerDialogHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CERTIFICATE_VIEWER_H_