[MD Settings] Fixes the crash when navigating directly to chrome://md-settings/signOut

chrome/browser/ui/webui/settings/profile_info_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/profile_info_handler.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 108 matching lines @@
 
   CHECK_EQ(1U, args->GetSize());
   const base::Value* callback_id;
   CHECK(args->Get(0, &callback_id));
 
   ResolveJavascriptCallback(*callback_id, *GetAccountNameAndIcon());
 }
 
 #if !defined(OS_CHROMEOS)
 void ProfileInfoHandler::HandleGetProfileStats(const base::ListValue* args) {
+  AllowJavascript();
+
   // Because there is open browser window for the current profile, statistics
   // from the ProfileAttributesStorage may not be up-to-date or may be missing
   // (e.g., |item.success| is false). Therefore, query the actual statistics.
   ProfileStatisticsFactory::GetForProfile(profile_)->GatherStatistics(
       base::Bind(&ProfileInfoHandler::PushProfileStatsCount,
                  base::Unretained(this)));
 }
 
 void ProfileInfoHandler::PushProfileStatsCount(
     profiles::ProfileCategoryStats stats) {
@@ skipping 83 matching lines @@
   response->SetString("name", name);
   response->SetString("iconUrl", icon_url);
   return base::WrapUnique(response);
 }
 
 bool ProfileInfoHandler::IsProfileManagingSupervisedUsers() const {
   return !profile_->GetPrefs()->GetDictionary(prefs::kSupervisedUsers)->empty();
 }
 
 }  // namespace settings