Call to URLDataManagerIOS::DeleteDataSources during shutdown

ios/web/app/web_main_loop.mm

 // Copyright 2014 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 "ios/web/app/web_main_loop.h"
 
 #include <stddef.h>
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/path_service.h"
 #include "base/power_monitor/power_monitor.h"
 #include "base/power_monitor/power_monitor_device_source.h"
 #include "base/process/process_metrics.h"
 #include "base/system_monitor/system_monitor.h"
 #include "base/threading/thread_restrictions.h"
 #include "crypto/nss_util.h"
 #include "ios/web/net/cookie_notification_bridge.h"
 #include "ios/web/public/app/web_main_parts.h"
 #include "ios/web/public/web_client.h"
 #include "ios/web/web_thread_impl.h"
+#include "ios/web/webui/url_data_manager_ios.h"
 #include "net/base/network_change_notifier.h"
 
 namespace web {
 
 // The currently-running WebMainLoop.  There can be one or zero.
 // TODO(rohitrao): Desktop uses this to implement
 // ImmediateShutdownAndExitProcess.  If we don't need that functionality, we can
 // remove this.
 WebMainLoop* g_current_web_main_loop = nullptr;
 
@@ skipping 208 matching lines @@
   }
 
   // Close the blocking I/O pool after the other threads. Other threads such
   // as the I/O thread may need to schedule work like closing files or flushing
   // data during shutdown, so the blocking pool needs to be available. There
   // may also be slow operations pending that will block shutdown, so closing
   // it here (which will block until required operations are complete) gives
   // more head start for those operations to finish.
   WebThreadImpl::ShutdownThreadPool();
 
+  URLDataManagerIOS::DeleteDataSources();
+
   if (parts_) {
     parts_->PostDestroyThreads();
   }
 }
 
 void WebMainLoop::InitializeMainThread() {
   const char* kThreadName = "CrWebMain";
   base::PlatformThread::SetName(kThreadName);
   if (main_message_loop_) {
     main_message_loop_->set_thread_name(kThreadName);
   }
 
   // Register the main thread by instantiating it, but don't call any methods.
   main_thread_.reset(
       new WebThreadImpl(WebThread::UI, base::MessageLoop::current()));
 }
 
 int WebMainLoop::WebThreadsStarted() {
   cookie_notification_bridge_.reset(new CookieNotificationBridge);
   return result_code_;
 }
 
 }  // namespace web