Bug 1653409 - Set ImageBitmap's picture rect using the picture rect of layers::Image, not the size. r=mstange

Differential Revision: https://phabricator.services.mozilla.com/D85356

dom/canvas/ImageBitmap.cpp

@@ -438,7 +438,7 @@ ImageBitmap::ImageBitmap(nsIGlobalObject* aGlobal, layers::Image* aData,
       mData(aData),
       mSurface(nullptr),
       mDataWrapper(new ImageUtils(mData)),
-      mPictureRect(0, 0, aData->GetSize().width, aData->GetSize().height),
+      mPictureRect(aData->GetPictureRect()),
       mAlphaType(aAlphaType),
       mAllocatedImageData(false),
       mWriteOnly(aWriteOnly) {