[FileAPI] Clean up WebFileSystemImpl before Blink shutdown

content/child/child_thread.cc

 // Copyright (c) 2012 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 "content/child/child_thread.h"
 
 #include <signal.h>
 
 #include <string>
 
@@ skipping 11 matching lines @@
 #include "base/synchronization/condition_variable.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_local.h"
 #include "base/tracked_objects.h"
 #include "components/tracing/child_trace_message_filter.h"
 #include "content/child/child_histogram_message_filter.h"
 #include "content/child/child_process.h"
 #include "content/child/child_resource_message_filter.h"
 #include "content/child/child_shared_bitmap_manager.h"
 #include "content/child/fileapi/file_system_dispatcher.h"
+#include "content/child/fileapi/webfilesystem_impl.h"
 #include "content/child/mojo/mojo_application.h"
 #include "content/child/power_monitor_broadcast_source.h"
 #include "content/child/quota_dispatcher.h"
 #include "content/child/quota_message_filter.h"
 #include "content/child/resource_dispatcher.h"
 #include "content/child/service_worker/service_worker_dispatcher.h"
 #include "content/child/service_worker/service_worker_message_filter.h"
 #include "content/child/socket_stream_dispatcher.h"
 #include "content/child/thread_safe_sender.h"
 #include "content/child/websocket_dispatcher.h"
@@ skipping 291 matching lines @@
   // but it wasn't possible to do so on POSIX.
   channel_->ClearIPCTaskRunner();
   g_lazy_tls.Pointer()->Set(NULL);
 }
 
 void ChildThread::Shutdown() {
   // Delete objects that hold references to blink so derived classes can
   // safely shutdown blink in their Shutdown implementation.
   file_system_dispatcher_.reset();
   quota_dispatcher_.reset();
+  WebFileSystemImpl::DeleteThreadSpecificInstance();
 }
 
 void ChildThread::OnChannelConnected(int32 peer_pid) {
   channel_connected_factory_.InvalidateWeakPtrs();
 }
 
 void ChildThread::OnChannelError() {
   set_on_channel_error_called(true);
   base::MessageLoop::current()->Quit();
 }
@@ skipping 187 matching lines @@
   // inflight that would addref it.
   Send(new ChildProcessHostMsg_ShutdownRequest);
 }
 
 void ChildThread::EnsureConnected() {
   VLOG(0) << "ChildThread::EnsureConnected()";
   base::KillProcess(base::GetCurrentProcessHandle(), 0, false);
 }
 
 }  // namespace content