Use union type in ImageBitmapFactories.idl

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

Index: third_party/WebKit/Source/core/html/HTMLImageElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLImageElement.cpp b/third_party/WebKit/Source/core/html/HTMLImageElement.cpp
index ae94760df80dc15558cfd47ca4327036312ba7e1..f551568541126312c6beef37e2725b5d02b7da97 100644
--- a/third_party/WebKit/Source/core/html/HTMLImageElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLImageElement.cpp
@@ -34,6 +34,7 @@
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/fetch/ImageResource.h"
+#include "core/frame/ImageBitmap.h"
 #include "core/frame/UseCounter.h"
 #include "core/html/HTMLAnchorElement.h"
 #include "core/html/HTMLCanvasElement.h"
@@ -676,6 +677,34 @@ void HTMLImageElement::forceReload() const
     imageLoader().updateFromElement(ImageLoader::UpdateForcedReload, m_referrerPolicy);
 }
 
+PassRefPtrWillBeRawPtr<ImageBitmap> HTMLImageElement::createImageBitmap(EventTarget& eventTarget, ImageBitmapSource* bitmapSource, int sx, int sy, int sw, int sh, ExceptionState& exceptionState)
+{
+    ASSERT(eventTarget.toDOMWindow());
+    HTMLImageElement* image = static_cast<HTMLImageElement*>(bitmapSource);
+    if (!image->cachedImage()) {
+        exceptionState.throwDOMException(InvalidStateError, "No image can be retrieved from the provided element.");
+        return nullptr;
+    }
+    if (image->cachedImage()->image()->isSVGImage()) {
+        exceptionState.throwDOMException(InvalidStateError, "The image element contains an SVG image, which is unsupported.");
+        return nullptr;
+    }
+    if (!sw || !sh) {
+        exceptionState.throwDOMException(IndexSizeError, String::format("The source %s provided is 0.", sw ? "height" : "width"));
+        return nullptr;
+    }
+    if (!image->cachedImage()->image()->currentFrameHasSingleSecurityOrigin()) {
+        exceptionState.throwSecurityError("The source image contains image data from multiple origins.");
+        return nullptr;
+    }
+    Document* document = eventTarget.toDOMWindow()->document();
+    if (!image->cachedImage()->passesAccessControlCheck(document->securityOrigin()) && document->securityOrigin()->taintsCanvas(image->src())) {
+        exceptionState.throwSecurityError("Cross-origin access to the source image is denied.");
+        return nullptr;
+    }
+    return ImageBitmap::create(image, IntRect(sx, sy, sw, sh));
+}
+
 void HTMLImageElement::selectSourceURL(ImageLoader::UpdateFromElementBehavior behavior)
 {
     if (!document().isActive())