Remove TextTrack.regions and VTTRegionList

third_party/WebKit/Source/core/html/track/LoadableTextTrack.h

Index: third_party/WebKit/Source/core/html/track/LoadableTextTrack.h
diff --git a/third_party/WebKit/Source/core/html/track/LoadableTextTrack.h b/third_party/WebKit/Source/core/html/track/LoadableTextTrack.h
index 496d5b6d7e1376949d05899b901e7b982a8b151a..e89c40c56dd31bee7b9a49f51364e0aa6f4d2092 100644
--- a/third_party/WebKit/Source/core/html/track/LoadableTextTrack.h
+++ b/third_party/WebKit/Source/core/html/track/LoadableTextTrack.h
@@ -33,7 +33,6 @@
 namespace blink {
 
 class HTMLTrackElement;
-class VTTRegion;
 
 class LoadableTextTrack final : public TextTrack {
  public:
@@ -45,7 +44,6 @@ class LoadableTextTrack final : public TextTrack {
   // TextTrack method.
   void setMode(const AtomicString&) override;
 
-  void addRegions(const HeapVector<Member<VTTRegion>>&);
   using TextTrack::addListOfCues;
 
   size_t trackElementIndex() const;