Right now we are only checking the op counts for the SkPicture or DisplayList that we are evaluating for the cache. But, if that Picture contains other nested Picture objects (via drawPicture() or drawDisplayList()) then the op counts for those nested pictures are ignored - they appear as a single "op".

Both SkPicture and DisplayList provide the mechanism to ask for the fully accumulated nested op counts (basically, passing in a flag to the method that provides the op counts) and we should be using that mechanism for our raster cache complexity metrics.