Add use counters for lots of DOM APIs.

third_party/WebKit/Source/modules/serviceworkers/Clients.idl

Index: third_party/WebKit/Source/modules/serviceworkers/Clients.idl
diff --git a/third_party/WebKit/Source/modules/serviceworkers/Clients.idl b/third_party/WebKit/Source/modules/serviceworkers/Clients.idl
index ec789010f4b399793ada108902700f95106cc397..77fc7bc2e523ed2667cd79e0973ffa13d9a477ac 100644
--- a/third_party/WebKit/Source/modules/serviceworkers/Clients.idl
+++ b/third_party/WebKit/Source/modules/serviceworkers/Clients.idl
@@ -7,8 +7,8 @@
     Exposed=ServiceWorker,
     ImplementedAs=ServiceWorkerClients,
 ] interface Clients {
-    [CallWith=ScriptState] Promise<any> get(DOMString id);
-    [CallWith=ScriptState] Promise<sequence<Client>> matchAll(optional ClientQueryOptions options);
-    [CallWith=ScriptState] Promise<WindowClient?> openWindow(USVString url);
-    [CallWith=ScriptState] Promise<void> claim();
+[Measure, CallWith=ScriptState] Promise<any> get(DOMString id);
+  [Measure, CallWith=ScriptState] Promise<sequence<Client>> matchAll(optional ClientQueryOptions options);
+  [Measure, CallWith=ScriptState] Promise<WindowClient?> openWindow(USVString url);
+  [Measure, CallWith=ScriptState] Promise<void> claim();
 };