benchmark

dc94612d - Fixes Background_Matting get_module interface (#785)

Fixes Background_Matting get_module interface (#785) Summary: Given the importance of the `get_module()` interface, we must implement it for every model. This PR forces the implementation of the `get_module()` interface across all models, and properly implement it for the `Background_Matting` model. Fixes https://github.com/pytorch/benchmark/issues/567. Pull Request resolved: https://github.com/pytorch/benchmark/pull/785 Reviewed By: jansel Differential Revision: D34804942 Pulled By: xuzhao9 fbshipit-source-id: 96708b9042a3fcf3e5f6c86c7cdfc5de0fbc3036