[Media Router] Add origins to sink query results.

chrome/browser/media/router/presentation_media_sinks_observer.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 CHROME_BROWSER_MEDIA_ROUTER_PRESENTATION_MEDIA_SINKS_OBSERVER_H_
 #define CHROME_BROWSER_MEDIA_ROUTER_PRESENTATION_MEDIA_SINKS_OBSERVER_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/media/router/media_sinks_observer.h"
 #include "content/public/browser/presentation_service_delegate.h"
 
 namespace content {
 class PresentationScreenAvailabilityListener;
 }
 
 namespace media_router {
 
 class MediaRouter;
 class MediaSource;
 
 // Receives SinkQueryResults for |source| from |router| and propagates results
 // to |listener|. |listener| is notified only when availability status has
 // changed, i.e. sinks have become available or sinks are no longer available.
 class PresentationMediaSinksObserver : public MediaSinksObserver {
  public:
   // |router|: Media router that publishes sink query results.
   // |listener|: Notified when sinks availability changes.
   // |source|: Filters available sink.
+  // |origin|: Origin of request.
   // Does not take ownership of |listener| or |router|.
   PresentationMediaSinksObserver(
       MediaRouter* router,
       content::PresentationScreenAvailabilityListener* listener,
-      const MediaSource& source);
+      const MediaSource& source,
+      const GURL& origin);
   ~PresentationMediaSinksObserver() override;
 
   // MediaSinksObserver implementation.
   void OnSinksReceived(const std::vector<MediaSink>& result) override;
 
   content::PresentationScreenAvailabilityListener* listener() const {
     return listener_;
   }
 
  private:
   enum Availability { UNKNOWN, AVAILABLE, UNAVAILABLE };
 
   content::PresentationScreenAvailabilityListener* listener_;
   Availability previous_availablity_;
 
   DISALLOW_COPY_AND_ASSIGN(PresentationMediaSinksObserver);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_MEDIA_ROUTER_PRESENTATION_MEDIA_SINKS_OBSERVER_H_