Measure usage of image/media/plugin/text documents

third_party/WebKit/Source/core/html/MediaDocument.cpp

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 16 matching lines @@
 
 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
 #include "core/HTMLNames.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/RawDataDocumentParser.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/events/Event.h"
 #include "core/events/EventListener.h"
 #include "core/events/KeyboardEvent.h"
 #include "core/frame/LocalFrame.h"
+#include "core/frame/UseCounter.h"
 #include "core/html/HTMLAnchorElement.h"
 #include "core/html/HTMLBodyElement.h"
 #include "core/html/HTMLContentElement.h"
 #include "core/html/HTMLDivElement.h"
 #include "core/html/HTMLHeadElement.h"
 #include "core/html/HTMLHtmlElement.h"
 #include "core/html/HTMLMetaElement.h"
 #include "core/html/HTMLSourceElement.h"
 #include "core/html/HTMLStyleElement.h"
 #include "core/html/HTMLVideoElement.h"
@@ skipping 180 matching lines @@
 
     createDocumentStructure();
     finish();
 }
 
 MediaDocument::MediaDocument(const DocumentInit& initializer)
     : HTMLDocument(initializer, MediaDocumentClass)
 {
     setCompatibilityMode(QuirksMode);
     lockCompatibilityMode();
+    UseCounter::count(*this, UseCounter::MediaDocument);
+    if (ownerElement())
+        UseCounter::count(*this, UseCounter::MediaDocumentInFrame);
 }
 
 DocumentParser* MediaDocument::createParser()
 {
     return MediaDocumentParser::create(this);
 }
 
 void MediaDocument::defaultEventHandler(Event* event)
 {
     Node* targetNode = event->target()->toNode();
     if (!targetNode)
         return;
 
     if (event->type() == EventTypeNames::keydown && event->isKeyboardEvent()) {
         HTMLVideoElement* video = Traversal<HTMLVideoElement>::firstWithin(*targetNode);
         if (!video)
             return;
 
         KeyboardEvent* keyboardEvent = toKeyboardEvent(event);
         if (keyboardEvent->keyIdentifier() == "U+0020" || keyboardEvent->keyCode() == VKEY_MEDIA_PLAY_PAUSE) {
             // space or media key (play/pause)
             video->togglePlayState();
             event->setDefaultHandled();
         }
     }
 }
 
 } // namespace blink