Add use counters for lots of DOM APIs.

third_party/WebKit/Source/core/html/track/VideoTrack.idl

Index: third_party/WebKit/Source/core/html/track/VideoTrack.idl
diff --git a/third_party/WebKit/Source/core/html/track/VideoTrack.idl b/third_party/WebKit/Source/core/html/track/VideoTrack.idl
index bb148b2acd834c0f4b0a8c4abe310b8d4f18a3d7..e299bdd04ecef0c417ba1981007619c03d4a675f 100644
--- a/third_party/WebKit/Source/core/html/track/VideoTrack.idl
+++ b/third_party/WebKit/Source/core/html/track/VideoTrack.idl
@@ -8,9 +8,9 @@
     RuntimeEnabled=AudioVideoTracks,
     SetWrapperReferenceFrom=owner,
 ] interface VideoTrack {
-  readonly attribute DOMString id;
-  readonly attribute DOMString kind;
-  readonly attribute DOMString label;
-  readonly attribute DOMString language;
-  attribute boolean selected;
+  [Measure] readonly attribute DOMString id;
+  [Measure] readonly attribute DOMString kind;
+  [Measure] readonly attribute DOMString label;
+  [Measure] readonly attribute DOMString language;
+  [Measure] attribute boolean selected;
 };