Revert "Remove MediaStreamTrack.getSources()."

third_party/WebKit/Source/modules/mediastream/MediaStreamTrack.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011 Ericsson AB. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 15 matching lines @@
 #include "modules/mediastream/MediaStreamTrack.h"
 
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/events/Event.h"
 #include "core/frame/Deprecation.h"
 #include "modules/mediastream/MediaConstraintsImpl.h"
 #include "modules/mediastream/MediaStream.h"
+#include "modules/mediastream/MediaStreamTrackSourcesCallback.h"
+#include "modules/mediastream/MediaStreamTrackSourcesRequestImpl.h"
 #include "modules/mediastream/MediaTrackSettings.h"
 #include "modules/mediastream/UserMediaController.h"
 #include "platform/mediastream/MediaStreamCenter.h"
 #include "platform/mediastream/MediaStreamComponent.h"
 #include "public/platform/WebMediaStreamTrack.h"
+#include "public/platform/WebSourceInfo.h"
 #include "wtf/Assertions.h"
 #include <memory>
 
 namespace blink {
 
 MediaStreamTrack* MediaStreamTrack::create(ExecutionContext* context,
                                            MediaStreamComponent* component) {
   MediaStreamTrack* track = new MediaStreamTrack(context, component);
   track->suspendIfNeeded();
   return track;
@@ skipping 70 matching lines @@
     case MediaStreamSource::ReadyStateMuted:
       return "muted";
     case MediaStreamSource::ReadyStateEnded:
       return "ended";
   }
 
   NOTREACHED();
   return String();
 }
 
+void MediaStreamTrack::getSources(ExecutionContext* context,
+                                  MediaStreamTrackSourcesCallback* callback,
+                                  ExceptionState& exceptionState) {
+  LocalFrame* frame = toDocument(context)->frame();
+  UserMediaController* userMedia = UserMediaController::from(frame);
+  if (!userMedia) {
+    exceptionState.throwDOMException(
+        NotSupportedError,
+        "No sources controller available; is this a detached window?");
+    return;
+  }
+  Deprecation::countDeprecation(context,
+                                UseCounter::MediaStreamTrackGetSources);
+  MediaStreamTrackSourcesRequest* request =
+      MediaStreamTrackSourcesRequestImpl::create(*context, callback);
+  userMedia->requestSources(request);
+}
+
 void MediaStreamTrack::stopTrack(ExceptionState& exceptionState) {
   if (ended())
     return;
 
   m_readyState = MediaStreamSource::ReadyStateEnded;
   MediaStreamCenter::instance().didStopMediaStreamTrack(component());
   dispatchEvent(Event::create(EventTypeNames::ended));
   propagateTrackEnded();
 }
 
@@ skipping 112 matching lines @@
 }
 
 DEFINE_TRACE(MediaStreamTrack) {
   visitor->trace(m_registeredMediaStreams);
   visitor->trace(m_component);
   EventTargetWithInlineData::trace(visitor);
   ActiveDOMObject::trace(visitor);
 }
 
 }  // namespace blink