cct_benchmark: Fix some warnings from Android Studio

Remove unnecessary casts, fix some javadoc syntax, remove an unnecessary
initializer.

Bug: 929926
Change-Id: Iae87750c61df121364b35414de80d3a17ca635cb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1667312
Reviewed-by: Benoit L <lizeb@chromium.org>
Commit-Queue: Egor Pasko <pasko@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#671615}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 90cf7fccc8a86fc5eca2aa9fad36cb781d231227
1 file changed