Replace MediaStreamUIController with MediaStreamUIProxy.

chrome/browser/media/media_capture_devices_dispatcher.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 CHROME_BROWSER_MEDIA_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_
 #define CHROME_BROWSER_MEDIA_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_
 
+#include <queue>
+
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "base/observer_list.h"
 #include "content/public/browser/media_observer.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/media_stream_request.h"
 
 namespace extensions {
 class Extension;
 }
 
 class AudioStreamIndicator;
 class MediaStreamCaptureIndicator;
 class PrefRegistrySyncable;
 class Profile;
 
 // This singleton is used to receive updates about media events from the content
 // layer.
-class MediaCaptureDevicesDispatcher : public content::MediaObserver {
+class MediaCaptureDevicesDispatcher : public content::MediaObserver,
+                                      public content::NotificationObserver {
  public:
   class Observer {
    public:
     // Handle an information update consisting of a up-to-date audio capture
     // device lists. This happens when a microphone is plugged in or unplugged.
     virtual void OnUpdateAudioDevices(
         const content::MediaStreamDevices& devices) {}
 
     // Handle an information update consisting of a up-to-date video capture
     // device lists. This happens when a camera is plugged in or unplugged.
@@ skipping 66 matching lines @@
       int stream_id,
       bool is_playing_and_audible) OVERRIDE;
 
   scoped_refptr<MediaStreamCaptureIndicator> GetMediaStreamCaptureIndicator();
 
   scoped_refptr<AudioStreamIndicator> GetAudioStreamIndicator();
 
  private:
   friend struct DefaultSingletonTraits<MediaCaptureDevicesDispatcher>;
 
+  struct PendingAccessRequest {
+    PendingAccessRequest(content::MediaStreamRequest request,
+                         content::MediaResponseCallback callback);
+    ~PendingAccessRequest();
+
+    content::MediaStreamRequest request;
+    content::MediaResponseCallback callback;
+  };
+  typedef std::queue<PendingAccessRequest> RequestsQueue;
+
   MediaCaptureDevicesDispatcher();
   virtual ~MediaCaptureDevicesDispatcher();
 
+  // content::NotificationObserver implementation.
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
   // Helpers for ProcessMediaAccessRequest().
   void ProcessScreenCaptureAccessRequest(
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback);
   void ProcessMediaAccessRequestFromExtension(
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback,
       const extensions::Extension* extension);
+  void ProcessRegularMediaAccessRequest(
+      content::WebContents* web_contents,
+      const content::MediaStreamRequest& request,
+      const content::MediaResponseCallback& callback);
+  void ProcessQueuedAccessRequest(content::WebContents* web_contents,
+                                  PendingAccessRequest& request);
+  void OnAccessRequestResponse(content::WebContents* web_contents,
+                               const content::MediaStreamDevices& devices,
+                               scoped_ptr<content::MediaStreamUI> ui);
 
   // Called by the MediaObserver() functions, executed on UI thread.
   void UpdateAudioDevicesOnUIThread(const content::MediaStreamDevices& devices);
   void UpdateVideoDevicesOnUIThread(const content::MediaStreamDevices& devices);
   void UpdateMediaRequestStateOnUIThread(
       int render_process_id,
       int render_view_id,
       const content::MediaStreamDevice& device,
       content::MediaRequestState state);
 
   // A list of cached audio capture devices.
   content::MediaStreamDevices audio_devices_;
 
   // A list of cached video capture devices.
   content::MediaStreamDevices video_devices_;
 
   // A list of observers for the device update notifications.
   ObserverList<Observer> observers_;
 
   // Flag to indicate if device enumeration has been done/doing.
   // Only accessed on UI thread.
   bool devices_enumerated_;
 
+  std::map<content::WebContents*, RequestsQueue> pending_requests_;
+
   scoped_refptr<MediaStreamCaptureIndicator> media_stream_capture_indicator_;
 
   scoped_refptr<AudioStreamIndicator> audio_stream_indicator_;
+
+  content::NotificationRegistrar notifications_registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaCaptureDevicesDispatcher);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_MEDIA_CAPTURE_DEVICES_DISPATCHER_H_