Add use counters for lots of DOM APIs.

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

Index: third_party/WebKit/Source/core/html/track/TextTrack.idl
diff --git a/third_party/WebKit/Source/core/html/track/TextTrack.idl b/third_party/WebKit/Source/core/html/track/TextTrack.idl
index ba60625242ea91eb2f986518c8fda83e213800e1..4b572a470a833cc69cd664033669fad0cd27dc24 100644
--- a/third_party/WebKit/Source/core/html/track/TextTrack.idl
+++ b/third_party/WebKit/Source/core/html/track/TextTrack.idl
@@ -31,22 +31,22 @@ enum TextTrackKind { "subtitles",  "captions",  "descriptions",  "chapters",  "m
 [
     SetWrapperReferenceFrom=owner,
 ] interface TextTrack : EventTarget {
-    readonly attribute TextTrackKind kind;
-    readonly attribute DOMString label;
-    readonly attribute DOMString language;
+    [Measure] readonly attribute TextTrackKind kind;
+    [Measure] readonly attribute DOMString label;
+    [Measure] readonly attribute DOMString language;
 
-    readonly attribute DOMString id;
+    [Measure] readonly attribute DOMString id;
     // readonly attribute DOMString inBandMetadataTrackDispatchType;
 
-    attribute TextTrackMode mode;
+    [Measure] attribute TextTrackMode mode;
 
-    readonly attribute TextTrackCueList? cues;
-    readonly attribute TextTrackCueList? activeCues;
+    [Measure] readonly attribute TextTrackCueList? cues;
+    [Measure] readonly attribute TextTrackCueList? activeCues;
 
-    void addCue(TextTrackCue cue);
-    [RaisesException] void removeCue(TextTrackCue cue);
+    [Measure] void addCue(TextTrackCue cue);
+  [Measure, RaisesException] void removeCue(TextTrackCue cue);
 
-    attribute EventHandler oncuechange;
+    [Measure] attribute EventHandler oncuechange;
 
     // TODO(foolip): These WebVTT extensions have been removed from the spec:
     // https://www.w3.org/Bugs/Public/show_bug.cgi?id=24380