Remove BrowserList::GetLastActive usage from WebUI pages.

chrome/browser/ui/webui/options2/certificate_manager_handler2.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/webui/options2/certificate_manager_handler2.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"  // for FileAccessProvider
 #include "base/memory/scoped_vector.h"
@@ skipping 475 matching lines @@
       break;
     default:
       NOTREACHED();
   }
 }
 
 void CertificateManagerHandler::View(const ListValue* args) {
   net::X509Certificate* cert = CallbackArgsToCert(args);
   if (!cert)
     return;
-  ShowCertificateViewer(GetParentWindow(), cert);
+  ShowCertificateViewer(web_ui()->GetWebContents(), GetParentWindow(), cert);
 }
 
 void CertificateManagerHandler::GetCATrust(const ListValue* args) {
   net::X509Certificate* cert = CallbackArgsToCert(args);
   if (!cert) {
     web_ui()->CallJavascriptFunction("CertificateEditCaTrustOverlay.dismiss");
     return;
   }
 
   net::CertDatabase::TrustBits trust_bits =
@@ skipping 554 matching lines @@
   web_ui()->CallJavascriptFunction("CertificateManager.onCheckTpmTokenReady",
                                    ready);
 }
 #endif
 
 gfx::NativeWindow CertificateManagerHandler::GetParentWindow() const {
   return web_ui()->GetWebContents()->GetView()->GetTopLevelNativeWindow();
 }
 
 }  // namespace options2