Use union type in ImageBitmapFactories.idl

third_party/WebKit/Source/core/frame/ImageBitmap.cpp

Index: third_party/WebKit/Source/core/frame/ImageBitmap.cpp
diff --git a/third_party/WebKit/Source/core/frame/ImageBitmap.cpp b/third_party/WebKit/Source/core/frame/ImageBitmap.cpp
index ddd4a86b58293da2028e6df44b9ecee79cf99221..b0159bbd84f9f4e1d3176fcaa8c0ba533e7e6413 100644
--- a/third_party/WebKit/Source/core/frame/ImageBitmap.cpp
+++ b/third_party/WebKit/Source/core/frame/ImageBitmap.cpp
@@ -187,6 +187,15 @@ IntSize ImageBitmap::size() const
     return IntSize(m_image->width(), m_image->height());
 }
 
+PassRefPtrWillBeRawPtr<ImageBitmap> ImageBitmap::createImageBitmap(EventTarget& eventTarget, ImageBitmapSource* bitmapSource, int sx, int sy, int sw, int sh, ExceptionState& exceptionState)
+{
+    if (!sw || !sh) {
+        exceptionState.throwDOMException(IndexSizeError, String::format("The source %s provided is 0.", sw ? "height" : "width"));
+        return nullptr;
+    }
+    return create(static_cast<ImageBitmap*>(bitmapSource), IntRect(sx, sy, sw, sh));
+}
+
 void ImageBitmap::notifyImageSourceChanged()
 {
 }