Use union type in ImageBitmapFactories.idl

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

Index: third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
index 47dfe4296a9a8aeefa3b9b225774817d354caf02..2d2916c2f3c8af57d869f901cc1d27613cda52a8 100644
--- a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
@@ -35,6 +35,7 @@
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/fileapi/File.h"
+#include "core/frame/ImageBitmap.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "core/html/ImageData.h"
@@ -933,6 +934,26 @@ FloatSize HTMLCanvasElement::elementSize() const
     return FloatSize(width(), height());
 }
 
+IntSize HTMLCanvasElement::bitmapSourceSize()
+{
+    return IntSize(width(), height());
+}
+
+ScriptPromise HTMLCanvasElement::createImageBitmap(ScriptState* scriptState, EventTarget& eventTarget, ImageBitmapSource* bitmapSource, int sx, int sy, int sw, int sh, ExceptionState& exceptionState)
+{
+    ASSERT(eventTarget.toDOMWindow());
+    HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(bitmapSource);
+    if (!canvas->originClean()) {
+        exceptionState.throwSecurityError("The canvas element provided is tainted with cross-origin data.");
+        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, canvas->isPaintable() ? ImageBitmap::create(canvas, IntRect(sx, sy, sw, sh)) : nullptr);
+}
+
 bool HTMLCanvasElement::isOpaque() const
 {
     return m_context && !m_context->hasAlpha();