Specify AllowCaching = false for some ChromeOS UI pages

chrome/browser/ui/webui/chromeos/mobile_setup_ui.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/chromeos/mobile_setup_ui.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 610 matching lines @@
   web_ui->AddMessageHandler(base::MakeUnique<MobileSetupHandler>());
   MobileSetupUIHTMLSource* html_source = new MobileSetupUIHTMLSource();
 
   // Set up the chrome://mobilesetup/ source.
   Profile* profile = Profile::FromWebUI(web_ui);
   content::URLDataSource::Add(profile, html_source);
 
   content::WebContentsObserver::Observe(web_ui->GetWebContents());
 }
 
+bool MobileSetupUI::AllowCaching() const {
+  // Should not be cached to reflect dynamically-generated contents.
+  return false;
+}
+
 void MobileSetupUI::DidFinishNavigation(
     content::NavigationHandle* navigation_handle) {
   if (!navigation_handle->HasCommitted() ||
       navigation_handle->GetRenderFrameHost()->GetFrameName() !=
           "paymentForm") {
     return;
   }
 
   if (navigation_handle->IsErrorPage()) {
     base::Value result_value(-navigation_handle->GetNetErrorCode());
     web_ui()->CallJavascriptFunctionUnsafe(kJsPortalFrameLoadFailedCallback,
                                            result_value);
     return;
   }
 
   web_ui()->CallJavascriptFunctionUnsafe(kJsPortalFrameLoadCompletedCallback);
 }