Add use counters for lots of DOM APIs.

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

Index: third_party/WebKit/Source/core/html/track/AudioTrack.idl
diff --git a/third_party/WebKit/Source/core/html/track/AudioTrack.idl b/third_party/WebKit/Source/core/html/track/AudioTrack.idl
index b0466f071a145053d1d94cab39afc20b5d4493f9..bf8e71d1228b66117591f34ed369c78aa29b6aaf 100644
--- a/third_party/WebKit/Source/core/html/track/AudioTrack.idl
+++ b/third_party/WebKit/Source/core/html/track/AudioTrack.idl
@@ -8,9 +8,9 @@
     RuntimeEnabled=AudioVideoTracks,
     SetWrapperReferenceFrom=owner,
 ] interface AudioTrack {
-  readonly attribute DOMString id;
-  readonly attribute DOMString kind;
-  readonly attribute DOMString label;
-  readonly attribute DOMString language;
-  attribute boolean enabled;
+  [Measure] readonly attribute DOMString id;
+  [Measure] readonly attribute DOMString kind;
+  [Measure] readonly attribute DOMString label;
+  [Measure] readonly attribute DOMString language;
+  [Measure] attribute boolean enabled;
 };