Reland of Check that all shared workers are terminated.

content/browser/browser_main_loop.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/browser/browser_main_loop.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 1085 matching lines @@
         break;
       }
       case BrowserThread::CACHE: {
         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:CacheThread");
         ResetThread_CACHE(std::move(cache_thread_));
         break;
       }
       case BrowserThread::IO: {
         TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:IOThread");
         ResetThread_IO(std::move(io_thread_));
+
+        // TODO(alokp): Remove after collecting crash data.
+        // Temporary checks to verify that all shared workers are terminated.
+        // It is suspected that shared workers prevent render process hosts
+        // from shutting down: crbug.com/608049
+        RenderProcessHostImpl::CheckAllWorkersTerminated();
         break;
       }
       case BrowserThread::UI:
       case BrowserThread::ID_COUNT:
       default:
         NOTREACHED();
         break;
     }
   }
   {
@@ skipping 417 matching lines @@
     scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner =
         audio_thread_->task_runner();
     audio_manager_ = media::AudioManager::Create(std::move(audio_task_runner),
                                                  std::move(worker_task_runner),
                                                  MediaInternals::GetInstance());
   }
   CHECK(audio_manager_);
 }
 
 }  // namespace content