DiaCrawler: Load type without loading their count
DiaCrawler: Load type without loading their count

The get_Count() function was getting stuck on large files.

BUG=
R=manzagop@chromium.org, siggi@chromium.org

Review URL: https://codereview.chromium.org/1325513007.

google/syzygy,supriyantomaftuh/syzygy,supriyantomaftuh/syzygy,Eloston/syzygy,google/syzygy,Eloston/syzygy,supriyantomaftuh/syzygy,supriyantomaftuh/syzygy,google/syzygy,google/syzygy