MD Settings: fix policy control detection on default browser section

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

 // Copyright 2015 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/settings_default_browser_handler.h"
 
 #include "base/bind.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/user_metrics.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/ui/startup/default_browser_prompt.h"
 #include "chrome/common/pref_names.h"
 #include "components/prefs/pref_service.h"
 #include "content/public/browser/web_ui.h"
 
 namespace settings {
 
 namespace {
 
 bool DefaultBrowserIsDisabledByPolicy() {
   const PrefService::Preference* pref =
       g_browser_process->local_state()->FindPreference(
           prefs::kDefaultBrowserSettingEnabled);
   DCHECK(pref);
-  return pref->IsManaged() && !pref->GetValue();
+  bool may_set_default_browser;
+  bool success = pref->GetValue()->GetAsBoolean(&may_set_default_browser);
+  DCHECK(success);
+  return pref->IsManaged() && !may_set_default_browser;
 }
 
 }  // namespace
 
 DefaultBrowserHandler::DefaultBrowserHandler(content::WebUI* webui)
     : weak_ptr_factory_(this) {
   default_browser_worker_ = new shell_integration::DefaultBrowserWorker(
       base::Bind(&DefaultBrowserHandler::OnDefaultBrowserWorkerFinished,
                  weak_ptr_factory_.GetWeakPtr()));
 }
@@ skipping 59 matching lines @@
   dict.SetBoolean("isUnknownError",
       state == shell_integration::UNKNOWN_DEFAULT);
   dict.SetBoolean("isDisabledByPolicy", DefaultBrowserIsDisabledByPolicy());
 
   CallJavascriptFunction("cr.webUIListenerCallback",
                          base::Value("settings.updateDefaultBrowserState"),
                          dict);
 }
 
 }  // namespace settings