@Override
    public void onSizeReady(int width, int height) {
        this.size = new int[]{width, height};
        viewTarget = null;
    }
Constructor that will extract the preload size from a given {@link View}.

@param view A not null View the size will be extracted from async using an {@link android.view.ViewTreeObserver
            .OnPreDrawListener}
core/src/main/java/com/bumptech/glide/util/ViewPreloadSizeProvider.java