CHECK instance_info_.empty() in ServiceWorkerProcessManager destructor

content/browser/service_worker/service_worker_process_manager.cc

 // 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 "content/browser/service_worker/service_worker_process_manager.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <utility>
@@ skipping 46 matching lines @@
       weak_this_factory_(this) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   weak_this_ = weak_this_factory_.GetWeakPtr();
 }
 
 ServiceWorkerProcessManager::~ServiceWorkerProcessManager() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DCHECK(IsShutdown())
       << "Call Shutdown() before destroying |this|, so that racing method "
       << "invocations don't use a destroyed BrowserContext.";
-  DCHECK(instance_info_.empty());
+  // TODO(horo): Remove after collecting crash data.
+  // Temporary checks to verify that ServiceWorkerProcessManager doesn't prevent
+  // render process hosts from shutting down: crbug.com/639193
+  CHECK(instance_info_.empty());
 }
 
 void ServiceWorkerProcessManager::Shutdown() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   {
     base::AutoLock lock(browser_context_lock_);
     browser_context_ = nullptr;
   }
 
   for (std::map<int, ProcessInfo>::const_iterator it = instance_info_.begin();
@@ skipping 252 matching lines @@
 namespace std {
 // Destroying ServiceWorkerProcessManagers only on the UI thread allows the
 // member WeakPtr to safely guard the object's lifetime when used on that
 // thread.
 void default_delete<content::ServiceWorkerProcessManager>::operator()(
     content::ServiceWorkerProcessManager* ptr) const {
   content::BrowserThread::DeleteSoon(
       content::BrowserThread::UI, FROM_HERE, ptr);
 }
 }  // namespace std