Image Capture: cache constraints and append them to MediaStreamTrack.getConstraints()

third_party/WebKit/Source/modules/imagecapture/ImageCapture.h

 // Copyright 2016 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 ImageCapture_h
 #define ImageCapture_h
 
 #include <memory>
 #include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/events/EventTarget.h"
 #include "media/capture/mojo/image_capture.mojom-blink.h"
 #include "modules/EventTargetModules.h"
 #include "modules/ModulesExport.h"
 #include "modules/mediastream/MediaTrackCapabilities.h"
+#include "modules/mediastream/MediaTrackConstraintSet.h"
 #include "platform/AsyncMethodRunner.h"
 
 namespace blink {
 
 class ExceptionState;
 class MediaStreamTrack;
-class MediaTrackConstraintSet;
 class PhotoSettings;
 class ScriptPromiseResolver;
 class WebImageCaptureFrameGrabber;
 
 // TODO(mcasas): Consideradding a LayoutTest checking that this class is not
 // garbage collected while it has event listeners.
 class MODULES_EXPORT ImageCapture final
     : public EventTargetWithInlineData,
       public ActiveScriptWrappable<ImageCapture>,
       public ContextLifecycleObserver {
@@ skipping 23 matching lines @@
   ScriptPromise setOptions(ScriptState*, const PhotoSettings&);
 
   ScriptPromise takePhoto(ScriptState*);
 
   ScriptPromise grabFrame(ScriptState*);
 
   MediaTrackCapabilities& getMediaTrackCapabilities();
 
   void setMediaTrackConstraints(ScriptPromiseResolver*,
                                 const MediaTrackConstraintSet&);
+  const MediaTrackConstraintSet& getMediaTrackConstraints() const;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   ImageCapture(ExecutionContext*, MediaStreamTrack*);
 
   void onCapabilities(ScriptPromiseResolver*,
                       media::mojom::blink::PhotoCapabilitiesPtr);
   void onSetOptions(ScriptPromiseResolver*, bool);
   void onTakePhoto(ScriptPromiseResolver*, media::mojom::blink::BlobPtr);
   void onCapabilitiesBootstrap(media::mojom::blink::PhotoCapabilitiesPtr);
   void onServiceConnectionError();
 
   Member<MediaStreamTrack> m_streamTrack;
   std::unique_ptr<WebImageCaptureFrameGrabber> m_frameGrabber;
   media::mojom::blink::ImageCapturePtr m_service;
   MediaTrackCapabilities m_capabilities;
 
+  MediaTrackConstraintSet m_currentConstraints;
+
   HeapHashSet<Member<ScriptPromiseResolver>> m_serviceRequests;
 };
 
 }  // namespace blink
 
 #endif  // ImageCapture_h