service worker: Avoid starting up for activation during shutdown

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 63 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;
 
+  // Returns true if Shutdown() has been called.
+  bool IsShutdown() const { return !browser_context_; }
+
  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.
   struct ProcessInfo {
     explicit ProcessInfo(const scoped_refptr<SiteInstance>& site_instance);
     explicit ProcessInfo(int process_id);
     ProcessInfo(const ProcessInfo& other);
     ~ProcessInfo();
 
     // Stores the SiteInstance the Worker lives inside. This needs to outlive
     // the instance's use of its RPH to uphold assumptions in the
     // ContentBrowserClient interface.
     scoped_refptr<SiteInstance> site_instance;
 
     // In case the process was allocated without using a SiteInstance, we need
     // to store a process ID to decrement a worker reference on shutdown.
     // TODO(jyasskin): Implement http://crbug.com/372045 or thread a frame_id in
     // so all processes can be allocated with a SiteInstance.
     int process_id;
   };
 
-  // Returns true if Shutdown() has been called.
-  bool IsShutdown() const { return !browser_context_; }
-
   // Maps the process ID to its reference count.
   typedef std::map<int, int> ProcessRefMap;
 
   // Maps registration scope pattern to ProcessRefMap.
   typedef std::map<const GURL, ProcessRefMap> PatternProcessRefMap;
 
   // Returns a process vector sorted by the reference count for the |pattern|.
   std::vector<int> SortProcessesForPattern(const GURL& pattern) const;
 
   // Returns the id of an available process for this pattern, or
@@ skipping 30 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_