Extract ProcessManager from ExtensionSystem.

extensions/browser/process_manager.h

 // Copyright 2013 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 EXTENSIONS_BROWSER_PROCESS_MANAGER_H_
 #define EXTENSIONS_BROWSER_PROCESS_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
+#include "components/keyed_service/core/keyed_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/common/view_type.h"
 
 class GURL;
 
 namespace content {
 class BrowserContext;
 class DevToolsAgentHost;
 class RenderViewHost;
 class RenderFrameHost;
 class SiteInstance;
 };
 
 namespace extensions {
 
 class Extension;
 class ExtensionHost;
 class ExtensionRegistry;
 class ProcessManagerDelegate;
 class ProcessManagerObserver;
 
 // Manages dynamic state of running Chromium extensions. There is one instance
 // of this class per Profile. OTR Profiles have a separate instance that keeps
 // track of split-mode extensions only.
-class ProcessManager : public content::NotificationObserver {
+class ProcessManager : public KeyedService,
+                       public content::NotificationObserver {
  public:
   typedef std::set<extensions::ExtensionHost*> ExtensionHostSet;
   typedef ExtensionHostSet::const_iterator const_iterator;
 
-  static ProcessManager* Create(content::BrowserContext* context);
+  static ProcessManager* Get(content::BrowserContext* context);
   ~ProcessManager() override;
 
   const ExtensionHostSet& background_hosts() const {
     return background_hosts_;
   }
 
   typedef std::set<content::RenderViewHost*> ViewSet;
   const ViewSet GetAllViews() const;
 
   // The typical observer interface.
@@ skipping 102 matching lines @@
   // Creates a non-incognito instance for tests. |registry| allows unit tests
   // to inject an ExtensionRegistry that is not managed by the usual
   // BrowserContextKeyedServiceFactory system.
   static ProcessManager* CreateForTesting(content::BrowserContext* context,
                                           ExtensionRegistry* registry);
 
   // Creates an incognito-context instance for tests.
   static ProcessManager* CreateIncognitoForTesting(
       content::BrowserContext* incognito_context,
       content::BrowserContext* original_context,
-      ProcessManager* original_manager,
       ExtensionRegistry* registry);
 
   bool startup_background_hosts_created_for_test() const {
     return startup_background_hosts_created_;
   }
 
  protected:
-  // If |context| is incognito pass the master context as |original_context|.
+  static ProcessManager* Create(content::BrowserContext* context);
+
+  //  |context| is incognito pass the master context as |original_context|.
   // Otherwise pass the same context for both. Pass the ExtensionRegistry for
   // |context| as |registry|, or override it for testing.
   ProcessManager(content::BrowserContext* context,
                  content::BrowserContext* original_context,
                  ExtensionRegistry* registry);
 
   // content::NotificationObserver:
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
   content::NotificationRegistrar registrar_;
 
   // The set of ExtensionHosts running viewless background extensions.
   ExtensionHostSet background_hosts_;
 
   // A SiteInstance related to the SiteInstance for all extensions in
   // this profile.  We create it in such a way that a new
   // browsing instance is created.  This controls process grouping.
   scoped_refptr<content::SiteInstance> site_instance_;
 
   // Not owned. Also used by IncognitoProcessManager.
   ExtensionRegistry* extension_registry_;
 
  private:
+  friend class ProcessManagerFactory;
   friend class ProcessManagerTest;
 
   // Extra information we keep for each extension's background page.
   struct BackgroundPageData;
   typedef std::string ExtensionId;
   typedef std::map<ExtensionId, BackgroundPageData> BackgroundPageDataMap;
   typedef std::map<content::RenderViewHost*,
       extensions::ViewType> ExtensionRenderViews;
 
   // Load all background pages once the profile data is ready and the pages
@@ skipping 70 matching lines @@
 
   // Must be last member, see doc on WeakPtrFactory.
   base::WeakPtrFactory<ProcessManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ProcessManager);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_PROCESS_MANAGER_H_