[1.8] Forced chunk loading

I'm trying to update my general Minecraft workspace to 1.8 because of the vastly improved GLSL Shaders supported by Optifine. Currently the only thing stopping me is the fact that I can't get the chunk pre-loading feature in Minema to work.

Originally in 1.7.10 the code looked like this:

private WorldRenderer[] worldRenderers;
...
for (WorldRenderer worldRenderer : worldRenderers) {
        	worldRenderer.updateRenderer(MC.renderViewEntity);
        }

The creator of the mod tried unsuccessfully to get this feature working on 1.8. He came up with this:

private Set<RenderChunk> chunksToUpdate;
private ChunkRenderDispatcher renderDispatcher;
...
Iterator<RenderChunk> iterator = chunksToUpdate.iterator();
        while (iterator.hasNext()) {
            RenderChunk renderChunk = iterator.next();
            renderDispatcher.updateChunkNow(renderChunk);
            renderChunk.setNeedsUpdate(false);
            iterator.remove();
        }

Wondering if anybody here has any idea how to go about this in 1.8. I have very little experience with Java and Minecraft Forge, so if you're willing to spoon-feed me it would be greatly appreciated. Also here's the source for this particular feature on GitHub:

https://github.com/ata4/minema/blob/master/src/main/java/info/ata4/minecraft/minema/client/modules/ChunkPreloader.java