[Extensions] Chromium crashed in single-process mode on fresh launch.

content/utility/in_process_utility_thread.cc

 // Copyright 2013 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/utility/in_process_utility_thread.h"
 
 #include "content/child/child_process.h"
 #include "content/utility/utility_thread_impl.h"
 
 namespace content {
 
 // We want to ensure there's only one utility thread running at a time, as there
 // are many globals used in the utility process.
 static base::LazyInstance<base::Lock> g_one_utility_thread_lock;
 
 InProcessUtilityThread::InProcessUtilityThread(const std::string& channel_id)
     : Thread("Chrome_InProcUtilityThread"), channel_id_(channel_id) {
 }
 
 InProcessUtilityThread::~InProcessUtilityThread() {
+  // Wait till in-process utility thread finishes clean up.
+  bool previous_value = base::ThreadRestrictions::SetIOAllowed(true);
   Stop();
+  base::ThreadRestrictions::SetIOAllowed(previous_value);
 }
 
 void InProcessUtilityThread::Init() {
   // We need to return right away or else the main thread that started us will
   // hang.
   base::MessageLoop::current()->PostTask(
       FROM_HERE,
       base::Bind(&InProcessUtilityThread::InitInternal,
                  base::Unretained(this)));
 }
@@ skipping 10 matching lines @@
   g_one_utility_thread_lock.Get().Acquire();
   child_process_.reset(new ChildProcess());
   child_process_->set_main_thread(new UtilityThreadImpl(channel_id_));
 }
 
 base::Thread* CreateInProcessUtilityThread(const std::string& channel_id) {
   return new InProcessUtilityThread(channel_id);
 }
 
 }  // namespace content