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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_TASK_MANAGER_GUEST_RESOURCE_PROVIDER_H_
      6 #define CHROME_BROWSER_TASK_MANAGER_GUEST_RESOURCE_PROVIDER_H_
      7 
      8 #include <map>
      9 
     10 #include "base/basictypes.h"
     11 #include "chrome/browser/task_manager/resource_provider.h"
     12 #include "content/public/browser/notification_observer.h"
     13 #include "content/public/browser/notification_registrar.h"
     14 
     15 class TaskManager;
     16 
     17 namespace content {
     18 class RenderViewHost;
     19 }
     20 
     21 namespace task_manager {
     22 
     23 class GuestResource;
     24 
     25 class GuestResourceProvider : public ResourceProvider,
     26                               public content::NotificationObserver {
     27  public:
     28   explicit GuestResourceProvider(TaskManager* task_manager);
     29 
     30   // ResourceProvider methods:
     31   virtual Resource* GetResource(int origin_pid,
     32                                 int render_process_host_id,
     33                                 int routing_id) OVERRIDE;
     34   virtual void StartUpdating() OVERRIDE;
     35   virtual void StopUpdating() OVERRIDE;
     36 
     37   // content::NotificationObserver method:
     38   virtual void Observe(int type,
     39                        const content::NotificationSource& source,
     40                        const content::NotificationDetails& details) OVERRIDE;
     41 
     42  private:
     43   virtual ~GuestResourceProvider();
     44 
     45   void Add(content::RenderViewHost* render_view_host);
     46   void Remove(content::RenderViewHost* render_view_host);
     47 
     48   // Whether we are currently reporting to the task manager. Used to ignore
     49   // notifications sent after StopUpdating().
     50   bool updating_;
     51 
     52   TaskManager* task_manager_;
     53 
     54   typedef std::map<content::RenderViewHost*, GuestResource*> GuestResourceMap;
     55   GuestResourceMap resources_;
     56 
     57   // A scoped container for notification registries.
     58   content::NotificationRegistrar registrar_;
     59 
     60   DISALLOW_COPY_AND_ASSIGN(GuestResourceProvider);
     61 };
     62 
     63 }  // namespace task_manager
     64 
     65 #endif  // CHROME_BROWSER_TASK_MANAGER_GUEST_RESOURCE_PROVIDER_H_
     66