Add support for device-change notifications to MediaStreamDispatcher and MediaStreamDispatcherHost

content/browser/renderer_host/media/media_stream_dispatcher_host.h

 // Copyright (c) 2012 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_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_
 
 #include <map>
 #include <string>
 #include <utility>
+#include <vector>
 
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "content/browser/renderer_host/media/media_stream_manager.h"
 #include "content/browser/renderer_host/media/media_stream_requester.h"
 #include "content/common/content_export.h"
 #include "content/common/media/media_stream_options.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "content/public/browser/resource_context.h"
 
 namespace content {
 
 class MediaStreamManager;
+class MediaStreamUIProxy;
 class ResourceContext;
 
 // MediaStreamDispatcherHost is a delegate for Media Stream API messages used by
 // MediaStreamImpl.  There is one MediaStreamDispatcherHost per
 // RenderProcessHost, the former owned by the latter.
 class CONTENT_EXPORT MediaStreamDispatcherHost : public BrowserMessageFilter,
                                                  public MediaStreamRequester {
  public:
-  MediaStreamDispatcherHost(
-      int render_process_id,
-      const ResourceContext::SaltCallback& salt_callback,
-      MediaStreamManager* media_stream_manager);
+  MediaStreamDispatcherHost(int render_process_id,
+                            const ResourceContext::SaltCallback& salt_callback,
+                            MediaStreamManager* media_stream_manager,
+                            bool use_fake_ui = false);
 
   // MediaStreamRequester implementation.
   void StreamGenerated(int render_frame_id,
                        int page_request_id,
                        const std::string& label,
                        const StreamDeviceInfoArray& audio_devices,
                        const StreamDeviceInfoArray& video_devices) override;
   void StreamGenerationFailed(
       int render_frame_id,
       int page_request_id,
@@ skipping 41 matching lines @@
 
   void OnOpenDevice(int render_frame_id,
                     int page_request_id,
                     const std::string& device_id,
                     MediaStreamType type,
                     const GURL& security_origin);
 
   void OnCloseDevice(int render_frame_id,
                      const std::string& label);
 
+  void OnSubscribeToDeviceChangeNotifications(int render_frame_id,
+                                              const GURL& security_origin);
+
+  void OnCancelDeviceChangeNotifications(int render_frame_id);
+
   void StoreRequest(int render_frame_id,
                     int page_request_id,
                     const std::string& label);
 
   bool IsURLAllowed(const GURL& url);
 
+  std::unique_ptr<MediaStreamUIProxy> CreateMediaStreamUIProxy();
+  void HandleCheckAccessResponse(std::unique_ptr<MediaStreamUIProxy> ui_proxy,
+                                 int render_frame_id,
+                                 bool have_access);
+
   int render_process_id_;
   ResourceContext::SaltCallback salt_callback_;
   MediaStreamManager* media_stream_manager_;
 
+  struct DeviceChangeSubscriberInfo {
+    int render_frame_id;
+    GURL security_origin;

[palmer, 2016/04/26 23:25:02]

Here, too.

[Guido Urdaneta, 2016/05/01 11:08:39]

Done.

+  };
+  std::vector<DeviceChangeSubscriberInfo> device_change_subscribers_;
+  bool use_fake_ui_;
+
+  base::WeakPtrFactory<MediaStreamDispatcherHost> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(MediaStreamDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_