Add use counters for lots of DOM APIs.

third_party/WebKit/Source/core/html/HTMLDialogElement.idl

Index: third_party/WebKit/Source/core/html/HTMLDialogElement.idl
diff --git a/third_party/WebKit/Source/core/html/HTMLDialogElement.idl b/third_party/WebKit/Source/core/html/HTMLDialogElement.idl
index e6704616f29c3164b46f5a32d31e02d4969993a7..ac43d19fb6a4bb14491dfe79585da364774fc35a 100644
--- a/third_party/WebKit/Source/core/html/HTMLDialogElement.idl
+++ b/third_party/WebKit/Source/core/html/HTMLDialogElement.idl
@@ -26,11 +26,11 @@
 // https://html.spec.whatwg.org/#the-dialog-element
 
 interface HTMLDialogElement : HTMLElement {
-    [CEReactions, Reflect] attribute boolean open;
-    attribute DOMString returnValue;
+  [MeasureAs=DialogAPI, CEReactions, Reflect] attribute boolean open;
+    [MeasureAs=DialogAPI] attribute DOMString returnValue;
     // FIXME: show() and showModal() should take an anchor argument.
-    [CEReactions] void show();
-    [CEReactions, RaisesException] void showModal();
+  [MeasureAs=DialogAPI, CEReactions] void show();
+  [MeasureAs=DialogAPI, CEReactions, RaisesException] void showModal();
     // FIXME: The returnValue argument should have no default value.
-    [CEReactions, RaisesException] void close(optional DOMString returnValue = null);
+  [MeasureAs=DialogAPI, CEReactions, RaisesException] void close(optional DOMString returnValue = null);
 };