Add use counters for lots of DOM APIs.

third_party/WebKit/Source/core/css/MediaList.idl

Index: third_party/WebKit/Source/core/css/MediaList.idl
diff --git a/third_party/WebKit/Source/core/css/MediaList.idl b/third_party/WebKit/Source/core/css/MediaList.idl
index c35accb7276bf9087b5a612bb4eb4a376aa30421..eb6888fdae4c77a4bfcbc855280e37c52e590311 100644
--- a/third_party/WebKit/Source/core/css/MediaList.idl
+++ b/third_party/WebKit/Source/core/css/MediaList.idl
@@ -28,10 +28,10 @@
 // TODO(foolip): MediaList should be an [ArrayClass].
 interface MediaList {
     // TODO(foolip): [TreatNullAs=EmptyString] stringifier attribute DOMString mediaText;
-    attribute DOMString? mediaText;
-    readonly attribute unsigned long length;
-    [Measure] getter DOMString? item(unsigned long index);
+    [MeasureAs=MediaListAPI] attribute DOMString? mediaText;
+    [MeasureAs=MediaListAPI] readonly attribute unsigned long length;
+    [MeasureAs=MediaListAPI] getter DOMString? item(unsigned long index);
     // TODO(foolip): appendMedium() and deleteMedium() should never throw.
-    [RaisesException] void appendMedium(DOMString medium);
-    [RaisesException] void deleteMedium(DOMString medium);
+    [RaisesException, MeasureAs=MediaListAPI] void appendMedium(DOMString medium);
+    [RaisesException, MeasureAs=MediaListAPI] void deleteMedium(DOMString medium);
 };