[proof-of-concept] SW thread independent of the main thread

content/browser/service_worker/service_worker_process_manager.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_SERVICE_WORKER_SERVICE_WORKER_PROCESS_MANAGER_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_PROCESS_MANAGER_H_
 
 #include <map>
 #include <memory>
 #include <vector>
@@ skipping 67 matching lines @@
   }
 
   // Adds/removes process reference for the |pattern|, the process with highest
   // references count will be chosen to start a worker.
   void AddProcessReferenceToPattern(const GURL& pattern, int process_id);
   void RemoveProcessReferenceFromPattern(const GURL& pattern, int process_id);
 
   // Returns true if the |pattern| has at least one process to run.
   bool PatternHasProcessToRun(const GURL& pattern) const;
 
+  void FindAvailableProcessAndCallbackOnUI(const GURL& pattern,
+                                           const base::Callback<void(int)>);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerProcessManagerTest, SortProcess);
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerProcessManagerTest,
                            FindAvailableProcess);
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerProcessManagerTest,
                            AllocateWorkerProcess_FindAvailableProcess);
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerProcessManagerTest,
                            AllocateWorkerProcess_InShutdown);
 
   // Information about the process for an EmbeddedWorkerInstance.
@@ skipping 65 matching lines @@
 
 namespace std {
 // Specialized to post the deletion to the UI thread.
 template <>
 struct CONTENT_EXPORT default_delete<content::ServiceWorkerProcessManager> {
   void operator()(content::ServiceWorkerProcessManager* ptr) const;
 };
 }  // namespace std
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_PROCESS_MANAGER_H_