Add use counters for lots of DOM APIs.

third_party/WebKit/Source/core/animation/Animation.idl

Index: third_party/WebKit/Source/core/animation/Animation.idl
diff --git a/third_party/WebKit/Source/core/animation/Animation.idl b/third_party/WebKit/Source/core/animation/Animation.idl
index 9f49ff93854b0f854314b240ebcec4e9435b7e5b..f5b73d2b0be7727c02f5321bf18a84d47eb22c7a 100644
--- a/third_party/WebKit/Source/core/animation/Animation.idl
+++ b/third_party/WebKit/Source/core/animation/Animation.idl
@@ -38,8 +38,8 @@ enum AnimationPlayState { "idle", "pending", "running", "paused", "finished" };
     NoInterfaceObject,
 ] interface Animation : EventTarget {
     // TODO(suzyh): Make timeline mutable.
-    [RuntimeEnabled=WebAnimationsAPI] attribute AnimationEffectReadOnly? effect;
-    [RuntimeEnabled=WebAnimationsAPI] readonly attribute AnimationTimeline? timeline;
+    [RuntimeEnabled=WebAnimationsAPI, Measure] attribute AnimationEffectReadOnly? effect;
+    [RuntimeEnabled=WebAnimationsAPI, Measure] readonly attribute AnimationTimeline? timeline;
     [Measure] attribute double?    startTime;
     [Measure] attribute double?    currentTime;
     [Measure] attribute double     playbackRate;
@@ -52,6 +52,6 @@ enum AnimationPlayState { "idle", "pending", "running", "paused", "finished" };
     [Measure] void cancel();
     [Measure] attribute EventHandler onfinish;
     [Measure] attribute EventHandler oncancel;
-    [RuntimeEnabled=WebAnimationsAPI, CallWith=ScriptState] readonly attribute Promise<Animation> finished;
-    [RuntimeEnabled=WebAnimationsAPI, CallWith=ScriptState] readonly attribute Promise<Animation> ready;
+    [RuntimeEnabled=WebAnimationsAPI, CallWith=ScriptState, Measure] readonly attribute Promise<Animation> finished;
+    [RuntimeEnabled=WebAnimationsAPI, CallWith=ScriptState, Measure] readonly attribute Promise<Animation> ready;
 };