tools/gn: include exec_process.h in the source file.

exec_process.cc is the source file implementation of exec_process.h,
but somehow we forgot to include its corresponding header file. This
patch fixes that.

It also add it to the unittest file where it was also missing.

build_config.h was also included for the usage of OS_XXX macros.

BUG=None
R=mostynb@opera.com
TBR=brettw@chromium.org

Review URL: https://codereview.chromium.org/1447513002

Cr-Original-Commit-Position: refs/heads/master@{#359752}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: dbddfb93fea971bb8b3fa75117975c53633ee694
2 files changed
tree: 417b931bbcdf1146f54653d0364fde399f315c88
  1. tools/