Reland of Check that all shared workers are terminated.

content/browser/shared_worker/shared_worker_service_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_SHARED_WORKER_SHARED_WORKER_SERVICE_IMPL_H_
 #define CONTENT_BROWSER_SHARED_WORKER_SHARED_WORKER_SERVICE_IMPL_H_
 
 #include <map>
 #include <memory>
 #include <set>
@@ skipping 75 matching lines @@
   void OnSharedWorkerMessageFilterClosing(
       SharedWorkerMessageFilter* filter);
 
   // Checks the worker dependency of renderer processes and calls
   // IncrementWorkerRefCount and DecrementWorkerRefCount of
   // RenderProcessHostImpl on UI thread if necessary.
   void CheckWorkerDependency();
 
   void NotifyWorkerDestroyed(int worker_process_id, int worker_route_id);
 
+  // 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
+  void CheckAllWorkersTerminated();
+
  private:
   class SharedWorkerPendingInstance;
   class SharedWorkerReserver;
 
   friend struct base::DefaultSingletonTraits<SharedWorkerServiceImpl>;
   friend class SharedWorkerServiceImplTest;
 
   using UpdateWorkerDependencyFunc = void (*)(const std::vector<int>&,
                                               const std::vector<int>&);
   using TryIncrementWorkerRefCountFunc = bool (*)(bool);
@@ skipping 63 matching lines @@
   int next_pending_instance_id_;
 
   base::ObserverList<WorkerServiceObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(SharedWorkerServiceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SHARED_WORKER_SHARED_WORKER_SERVICE_IMPL_H_