MD Settings: fix policy control detection on default browser section

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

Index: chrome/browser/ui/webui/settings/settings_default_browser_handler.cc
diff --git a/chrome/browser/ui/webui/settings/settings_default_browser_handler.cc b/chrome/browser/ui/webui/settings/settings_default_browser_handler.cc
index f8cb64a19a848340fe27c164d98a8a4303399d16..03abb0f60e1db2483049d50fb50cf1274d71a1b0 100644
--- a/chrome/browser/ui/webui/settings/settings_default_browser_handler.cc
+++ b/chrome/browser/ui/webui/settings/settings_default_browser_handler.cc
@@ -22,7 +22,10 @@ bool DefaultBrowserIsDisabledByPolicy() {
       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