[code coverage] Hard code the path of the coverage wrapper input file.

R=jbudorick,stgao,liaoyuke

Change-Id: I5ce2f9c8aa14fe5114220ee2438ea48acec4f8a1
Reviewed-on: https://chromium-review.googlesource.com/c/1327165
Commit-Queue: Roberto Carrillo <robertocn@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606754}
2 files changed