Support createImageBitmap from a SVG image

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 672 matching lines @@
 }
 
 ScriptPromise HTMLImageElement::createImageBitmap(ScriptState* scriptState, EventTarget& eventTarget, int sx, int sy, int sw, int sh, const ImageBitmapOptions& options, ExceptionState& exceptionState)
 {
     ASSERT(eventTarget.toDOMWindow());
     if (!cachedImage()) {
         exceptionState.throwDOMException(InvalidStateError, "No image can be retrieved from the provided element.");
         return ScriptPromise();
     }
     if (cachedImage()->getImage()->isSVGImage()) {
-        exceptionState.throwDOMException(InvalidStateError, "The image element contains an SVG image, which is unsupported.");
-        return ScriptPromise();
+        SVGImage* image = toSVGImage(cachedImage()->getImage());
+        if (!image->hasIntrinsicDimensions()) {
+            exceptionState.throwDOMException(InvalidStateError, "The image element contains an SVG image without intrinsic dimensions.");
+            return ScriptPromise();
+        }
     }
     if (!sw || !sh) {
         exceptionState.throwDOMException(IndexSizeError, String::format("The source %s provided is 0.", sw ? "height" : "width"));
         return ScriptPromise();
     }
     return ImageBitmapSource::fulfillImageBitmap(scriptState, ImageBitmap::create(this, IntRect(sx, sy, sw, sh), eventTarget.toDOMWindow()->document(), options));
 }
 
 void HTMLImageElement::selectSourceURL(ImageLoader::UpdateFromElementBehavior behavior)
 {
@@ skipping 108 matching lines @@
 {
     ImageResource* image = cachedImage();
     if (!image)
         return IntSize();
     LayoutSize lSize = image->imageSize(LayoutObject::shouldRespectImageOrientation(layoutObject()), 1.0f);
     ASSERT(lSize.fraction().isZero());
     return IntSize(lSize.width(), lSize.height());
 }
 
 } // namespace blink