Cleanup: Remove video constraint names

content/common/media/media_stream_options.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_COMMON_MEDIA_MEDIA_STREAM_OPTIONS_H_
 #define CONTENT_COMMON_MEDIA_MEDIA_STREAM_OPTIONS_H_
 
 #include <string>
 #include <vector>
 
 #include "content/common/content_export.h"
 #include "content/public/common/media_stream_request.h"
 
 namespace content {
 
-// MediaStreamConstraint keys for constraints that are passed to getUserMedia.
-CONTENT_EXPORT extern const char kMediaStreamSource[];
-CONTENT_EXPORT extern const char kMediaStreamSourceId[];
-CONTENT_EXPORT extern const char kMediaStreamSourceInfoId[];
+// Names for media stream source capture types.
+// These are values of the "TrackControls.stream_source" field, and are
+// set via the "chromeMediaSource" constraint.
 CONTENT_EXPORT extern const char kMediaStreamSourceTab[];
 CONTENT_EXPORT extern const char kMediaStreamSourceScreen[];
 CONTENT_EXPORT extern const char kMediaStreamSourceDesktop[];
 CONTENT_EXPORT extern const char kMediaStreamSourceSystem[];
 
-// Experimental constraint to do device matching.  When this optional constraint
-// is set, WebRTC audio renderer will render audio from media streams to an
-// output device that belongs to the same hardware as the requested source
-// device belongs to.
-CONTENT_EXPORT extern const char kMediaStreamRenderToAssociatedSink[];
-
-// Controls whether the hotword audio stream is used on platforms that support
-// it.
-CONTENT_EXPORT extern const char kMediaStreamAudioHotword[];
-
 struct CONTENT_EXPORT TrackControls {
  public:
   TrackControls();
   TrackControls(bool request);
   TrackControls(const TrackControls& other);
   ~TrackControls();
   bool requested;
 
   // Source. This is "tab", "screen", "desktop", "system", or blank.
   // Consider replacing with MediaStreamType enum variables.
@@ skipping 46 matching lines @@
 
   // Id for this capture session. Unique for all sessions of the same type.
   int session_id;
 };
 
 typedef std::vector<StreamDeviceInfo> StreamDeviceInfoArray;
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_MEDIA_MEDIA_STREAM_OPTIONS_H_