Recreate MediaPermissionDispatcher's service connection on navigation

content/renderer/media/media_permission_dispatcher.h

 // Copyright 2015 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_RENDERER_MEDIA_MEDIA_PERMISSION_DISPATCHER_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_PERMISSION_DISPATCHER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 15 matching lines @@
 // MediaPermission implementation using content PermissionService.
 class CONTENT_EXPORT MediaPermissionDispatcher : public media::MediaPermission {
  public:
   using ConnectToServiceCB = base::Callback<void(
       mojo::InterfaceRequest<blink::mojom::PermissionService>)>;
 
   explicit MediaPermissionDispatcher(
       const ConnectToServiceCB& connect_to_service_cb);
   ~MediaPermissionDispatcher() override;
 
+  // Called when the frame owning this MediaPermissionDispatcher is navigated.
+  void OnNavigation();
+
   // media::MediaPermission implementation.
   // Note: Can be called on any thread. The |permission_status_cb| will always
   // be fired on the thread where these methods are called.
   void HasPermission(Type type,
                      const GURL& security_origin,
                      const PermissionStatusCB& permission_status_cb) override;
   void RequestPermission(
       Type type,
       const GURL& security_origin,
       const PermissionStatusCB& permission_status_cb) override;
 
  private:
   // Map of request IDs and pending PermissionStatusCBs.
   typedef std::map<uint32_t, PermissionStatusCB> RequestMap;
 
   // Register PermissionStatusCBs. Returns |request_id| that can be used to make
   // PermissionService calls.
   uint32_t RegisterCallback(const PermissionStatusCB& permission_status_cb);
 
+  // Ensure there is a connection to the permission service and return it.
+  blink::mojom::PermissionService* GetPermissionService();
+
   // Callback for |permission_service_| calls.
   void OnPermissionStatus(uint32_t request_id,
                           blink::mojom::PermissionStatus status);
 
+  // Callback for |permission_service_| connection errors.
+  void OnConnectionError();
+
   ConnectToServiceCB connect_to_service_cb_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   uint32_t next_request_id_;
   RequestMap requests_;
   blink::mojom::PermissionServicePtr permission_service_;
 
   // Used to safely post MediaPermission calls for execution on |task_runner_|.
   base::WeakPtr<MediaPermissionDispatcher> weak_ptr_;
 
   base::WeakPtrFactory<MediaPermissionDispatcher> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaPermissionDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_PERMISSION_DISPATCHER_H_