MD Settings: Update some Settings handlers to use new JS lifecycle management.

chrome/browser/ui/webui/settings/certificates_handler.cc

 // Copyright 2016 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/settings/certificates_handler.h"
 
 #include <errno.h>
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 967 matching lines @@
     std::unique_ptr<CertificateManagerModel> model) {
   certificate_manager_model_ = std::move(model);
   CertificateManagerModelReady();
 }
 
 void CertificatesHandler::CertificateManagerModelReady() {
   base::FundamentalValue user_db_available_value(
       certificate_manager_model_->is_user_db_available());
   base::FundamentalValue tpm_available_value(
       certificate_manager_model_->is_tpm_available());
-  web_ui()->CallJavascriptFunction(
-      "cr.webUIListenerCallback", base::StringValue("certificates-model-ready"),
-      user_db_available_value, tpm_available_value);
+  CallJavascriptFunction("cr.webUIListenerCallback",
+                         base::StringValue("certificates-model-ready"),
+                         user_db_available_value, tpm_available_value);
   certificate_manager_model_->Refresh();
 }
 
 void CertificatesHandler::HandleRefreshCertificates(
     const base::ListValue* args) {
+  AllowJavascript();
+
   if (certificate_manager_model_) {
     // Already have a model, the webui must be re-loading.  Just re-run the
     // webui initialization.
     CertificateManagerModelReady();
     return;
   }
 
   if (!requested_certificate_manager_model_) {
     // Request that a model be created.
     CertificateManagerModel::Create(
@@ skipping 63 matching lines @@
         // TODO(mattm): Other columns.
         subnodes->Append(cert_dict);
       }
       std::sort(subnodes->begin(), subnodes->end(), comparator);
 
       dict->Set(kSubnodesField, subnodes);
       nodes->Append(dict);
     }
     std::sort(nodes->begin(), nodes->end(), comparator);
 
-    web_ui()->CallJavascriptFunction("cr.webUIListenerCallback",
-                                     base::StringValue("certificates-changed"),
-                                     base::StringValue(tab_name), *nodes);
+    CallJavascriptFunction("cr.webUIListenerCallback",
+                           base::StringValue("certificates-changed"),
+                           base::StringValue(tab_name), *nodes);
   }
 }
 
 void CertificatesHandler::ResolveCallback(const base::Value& response) {
   DCHECK(!webui_callback_id_.empty());
   ResolveJavascriptCallback(base::StringValue(webui_callback_id_), response);
   webui_callback_id_.clear();
 }
 
 void CertificatesHandler::RejectCallback(const base::Value& response) {
@@ skipping 41 matching lines @@
   error_info->Set(kCertificateErrors,
                   base::WrapUnique(cert_error_list.release()));
   RejectCallback(*error_info);
 }
 
 gfx::NativeWindow CertificatesHandler::GetParentWindow() const {
   return web_ui()->GetWebContents()->GetTopLevelNativeWindow();
 }
 
 }  // namespace settings