Make WebUI objects not derive from WebUI. WebUI objects own the controller. This is the ownership...

chrome/browser/ui/webui/cloud_print_signin_dialog.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/cloud_print_signin_dialog.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 75 matching lines @@
   if (type == content::NOTIFICATION_NAV_ENTRY_COMMITTED) {
     GURL url = web_ui()->web_contents()->GetURL();
     GURL dialog_url = CloudPrintURL(
         Profile::FromWebUI(web_ui())).GetCloudPrintServiceURL();
     if (url.host() == dialog_url.host() &&
         url.path() == dialog_url.path() &&
         url.scheme() == dialog_url.scheme()) {
       StoreDialogSize();
       web_ui()->web_contents()->GetRenderViewHost()->ClosePage();
       static_cast<PrintPreviewUI*>(
-          parent_tab_->GetWebUI())->OnReloadPrintersList();
+          parent_tab_->GetWebUI()->GetController())->OnReloadPrintersList();
     }
   }
 }
 
 void CloudPrintSigninFlowHandler::StoreDialogSize() {
   if (web_ui() &&
       web_ui()->web_contents() &&
       web_ui()->web_contents()->GetView()) {
     gfx::Size size = web_ui()->web_contents()->GetView()->GetContainerSize();
     Profile* profile = Profile::FromWebUI(web_ui());
@@ skipping 99 matching lines @@
 void CreateCloudPrintSigninDialog(WebContents* parent_tab) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&CreateCloudPrintSigninDialogImpl,
                  parent_tab->GetRenderProcessHost()->GetID(),
                  parent_tab->GetRenderViewHost()->routing_id()));
 }
 }  // namespace cloud_print_signin_dialog