Add SharedWorkerServiceImpl::CheckWorkerDependency().

content/browser/shared_worker/shared_worker_service_impl.h

Index: content/browser/shared_worker/shared_worker_service_impl.h
diff --git a/content/browser/shared_worker/shared_worker_service_impl.h b/content/browser/shared_worker/shared_worker_service_impl.h
index fd199894dedda196572c545976c37a06cc68eb1e..a60ec707f4dc995af09a695f169f85a68e06d39e 100644
--- a/content/browser/shared_worker/shared_worker_service_impl.h
+++ b/content/browser/shared_worker/shared_worker_service_impl.h
@@ -5,6 +5,8 @@
 #ifndef CONTENT_BROWSER_SHARED_WORKER_SHARED_WORKER_SERVICE_IMPL_H_
 #define CONTENT_BROWSER_SHARED_WORKER_SHARED_WORKER_SERVICE_IMPL_H_
 
+#include <set>
+
 #include "base/compiler_specific.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/memory/singleton.h"
@@ -85,12 +87,23 @@ class CONTENT_EXPORT SharedWorkerServiceImpl
   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();
+
  private:
   friend struct DefaultSingletonTraits<SharedWorkerServiceImpl>;
+  friend class SharedWorkerServiceImplTest;
+
+  typedef void (*UpdateWorkerDependencyFunc)(const std::vector<int>&,
+                                             const std::vector<int>&);
 
   SharedWorkerServiceImpl();
   virtual ~SharedWorkerServiceImpl();
 
+  void ResetForTesting();
+
   SharedWorkerHost* FindSharedWorkerHost(
       SharedWorkerMessageFilter* filter,
       int worker_route_id);
@@ -101,6 +114,16 @@ class CONTENT_EXPORT SharedWorkerServiceImpl
       const WorkerStoragePartition& worker_partition,
       ResourceContext* resource_context);
 
+  // Returns the IDs of the renderer processes which are executing
+  // SharedWorkers connected to other renderer processes.
+  const std::set<int> GetRenderersWithWorkerDependency();
+
+  void ChangeUpdateWorkerDependencyFuncForTesting(
+      UpdateWorkerDependencyFunc new_func);
+
+  std::set<int> last_worker_depended_renderers_;
+  UpdateWorkerDependencyFunc update_worker_dependency_;
+
   // Pair of render_process_id and worker_route_id.
   typedef std::pair<int, int> ProcessRouteIdPair;
   typedef base::ScopedPtrHashMap<ProcessRouteIdPair,