Drop status=experimental from a few RuntimeEnabledFeatures

Source/platform/RuntimeEnabledFeatures.in

Index: Source/platform/RuntimeEnabledFeatures.in
diff --git a/Source/platform/RuntimeEnabledFeatures.in b/Source/platform/RuntimeEnabledFeatures.in
index 7c1a24c1ef3ec9c5c0edc7a5091a7c365904693d..946db86c199f7bb5841293109fa61cce2ec061b4 100644
--- a/Source/platform/RuntimeEnabledFeatures.in
+++ b/Source/platform/RuntimeEnabledFeatures.in
@@ -18,7 +18,7 @@
 
 AnyPointerMediaQueries status=stable
 ApplicationCache status=stable
-AudioVideoTracks depends_on=Media, status=experimental
+AudioVideoTracks depends_on=Media
 AuthorShadowDOMForAnyElement
 BackgroundSync status=experimental
 BatteryStatus status=stable
@@ -76,9 +76,9 @@ FractionalScrollOffsets status=experimental
 GlobalFetch status=experimental
 Media status=stable
 MediaCapture
-MediaController depends_on=Media, status=experimental
+MediaController depends_on=Media
 MediaSource status=stable
-MediaSourceExperimental depends_on=MediaSource, status=experimental
+MediaSourceExperimental depends_on=MediaSource
 MediaStreamSpeech status=experimental
 MemoryInfoInWorkers status=experimental
 MouseEventButtonsAttribute status=experimental
@@ -151,7 +151,7 @@ WebAudio condition=WEB_AUDIO, status=stable
 WebGLDraftExtensions status=experimental
 WebGLImageChromium
 WebMIDI status=test
-WebVTTRegions depends_on=Media, status=experimental
+WebVTTRegions depends_on=Media
 V8IdleTasks
 XSLT status=stable
 SVG1DOM status=stable