[POC] copying video frame

Source/core/editing/Editor.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
@@ skipping 54 matching lines @@
 #include "core/fetch/ImageResource.h"
 #include "core/fetch/ResourceFetcher.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "core/frame/UseCounter.h"
 #include "core/html/HTMLCanvasElement.h"
 #include "core/html/HTMLImageElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLTextAreaElement.h"
+#include "core/html/HTMLVideoElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/loader/EmptyClients.h"
 #include "core/page/EditorClient.h"
 #include "core/page/EventHandler.h"
 #include "core/page/FocusController.h"
 #include "core/page/Page.h"
 #include "core/rendering/HitTestResult.h"
 #include "core/rendering/RenderImage.h"
 #include "core/svg/SVGImageElement.h"
 #include "platform/KillRing.h"
@@ skipping 350 matching lines @@
         RenderImage* renderImage = toRenderImage(renderer);
         if (!renderImage)
             return nullptr;
 
         ImageResource* cachedImage = renderImage->cachedImage();
         if (!cachedImage || cachedImage->errorOccurred())
             return nullptr;
         return cachedImage->imageForRenderer(renderImage);
     }
 
+    if (renderer->isMedia()) {
+        SourceImageStatus status;
+        return toHTMLVideoElement(node).getSourceImageForCanvas(CopySourceImageIfVolatile, &status).leakRef();
+    }
+
     return nullptr;
 }
 
 static void writeImageNodeToPasteboard(Pasteboard* pasteboard, Node* node, const String& title)
 {
     ASSERT(pasteboard);
     ASSERT(node);
 
     RefPtr<Image> image = imageFromNode(*node);
     if (!image.get())
@@ skipping 824 matching lines @@
 }
 
 void Editor::trace(Visitor* visitor)
 {
     visitor->trace(m_frame);
     visitor->trace(m_lastEditCommand);
     visitor->trace(m_mark);
 }
 
 } // namespace blink