Blob creation methods for ImageBitmap.

Source/core/page/DOMWindow.cpp

Index: Source/core/page/DOMWindow.cpp
diff --git a/Source/core/page/DOMWindow.cpp b/Source/core/page/DOMWindow.cpp
index 0cf36866717b3c677aa8239c7ba1574dc469fb89..cdc8cbee649d8f2d7ef565e35b313acf0aa2087a 100644
--- a/Source/core/page/DOMWindow.cpp
+++ b/Source/core/page/DOMWindow.cpp
@@ -1383,6 +1383,18 @@ DOMWindowCSS* DOMWindow::css()
     return m_css.get();
 }
 
+void DOMWindow::loadBlobAsync(ImageBitmapLoader* loader, Blob* blob)
+{
+    m_pendingImageBitmapLoaders.add(loader);
+    loader->start(blob);
+}
+
+void DOMWindow::finishedLoading(ImageBitmapLoader* loader)
+{
+    ASSERT(m_pendingImageBitmapLoaders.contains(loader));
+    m_pendingImageBitmapLoaders.remove(loader);
+}
+
 static void didAddStorageEventListener(DOMWindow* window)
 {
     // Creating these WebCore::Storage objects informs the system that we'd like to receive