Add use counters for lots of DOM APIs.

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

Index: third_party/WebKit/Source/core/html/track/TextTrackCue.idl
diff --git a/third_party/WebKit/Source/core/html/track/TextTrackCue.idl b/third_party/WebKit/Source/core/html/track/TextTrackCue.idl
index d10834b0effc963fc50cc21cbc8e3deb443d2178..dc49458d45cec9881b8a779f960996d95d694b31 100644
--- a/third_party/WebKit/Source/core/html/track/TextTrackCue.idl
+++ b/third_party/WebKit/Source/core/html/track/TextTrackCue.idl
@@ -28,13 +28,13 @@
 [
     SetWrapperReferenceFrom=owner,
 ] interface TextTrackCue : EventTarget {
-    readonly attribute TextTrack? track;
+    [Measure] readonly attribute TextTrack? track;
 
-    attribute DOMString id;
-    attribute double startTime;
-    attribute double endTime;
-    attribute boolean pauseOnExit;
+    [Measure] attribute DOMString id;
+    [Measure] attribute double startTime;
+    [Measure] attribute double endTime;
+    [Measure] attribute boolean pauseOnExit;
 
-    attribute EventHandler onenter;
-    attribute EventHandler onexit;
+    [Measure] attribute EventHandler onenter;
+    [Measure] attribute EventHandler onexit;
 };