Add metrics for usage of permission features from iframes in blink

third_party/WebKit/Source/modules/webmidi/NavigatorWebMIDI.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 18 matching lines @@
  */
 
 #include "modules/webmidi/NavigatorWebMIDI.h"
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/Document.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Navigator.h"
+#include "core/frame/UseCounter.h"
 #include "modules/webmidi/MIDIAccessInitializer.h"
 #include "modules/webmidi/MIDIOptions.h"
 
 namespace blink {
 
 NavigatorWebMIDI::NavigatorWebMIDI(LocalFrame* frame)
     : DOMWindowProperty(frame)
 {
 }
 
@@ skipping 26 matching lines @@
 {
     return NavigatorWebMIDI::from(navigator).requestMIDIAccess(scriptState, options);
 }
 
 ScriptPromise NavigatorWebMIDI::requestMIDIAccess(ScriptState* scriptState, const MIDIOptions& options)
 {
     if (!frame() || frame()->document()->activeDOMObjectsAreStopped()) {
         return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(AbortError, "The frame is not working."));
     }
 
+    UseCounter::countCrossOriginIframe(*frame()->document(), UseCounter::RequestMIDIAccessIframe);
     return MIDIAccessInitializer::start(scriptState, options);
 }
 
 } // namespace blink