Image Capture: add |points_of_interest| to mojo and wire it to IDL layer

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

Index: third_party/WebKit/Source/modules/imagecapture/ImageCapture.h
diff --git a/third_party/WebKit/Source/modules/imagecapture/ImageCapture.h b/third_party/WebKit/Source/modules/imagecapture/ImageCapture.h
index 1e307a21b30ec55afcd4bae803b836174beccf4b..3630f00ee2663cbc56470e78a13de982a85a9c8b 100644
--- a/third_party/WebKit/Source/modules/imagecapture/ImageCapture.h
+++ b/third_party/WebKit/Source/modules/imagecapture/ImageCapture.h
@@ -77,6 +77,9 @@ class MODULES_EXPORT ImageCapture final
   void onSetOptions(ScriptPromiseResolver*, bool);
   void onTakePhoto(ScriptPromiseResolver*, media::mojom::blink::BlobPtr);
   void onCapabilitiesUpdate(media::mojom::blink::PhotoCapabilitiesPtr);
+
+  void onCapabilitiesUpdateInternal(
+      const media::mojom::blink::PhotoCapabilities&);
   void onServiceConnectionError();
 
   Member<MediaStreamTrack> m_streamTrack;
@@ -86,6 +89,8 @@ class MODULES_EXPORT ImageCapture final
   MediaTrackCapabilities m_capabilities;
   MediaTrackConstraintSet m_currentConstraints;
 
+  HeapVector<Point2D> m_currentPointsOfInterest;
+
   HeapHashSet<Member<ScriptPromiseResolver>> m_serviceRequests;
 };