Add rest of chrome_cleaner engines/common subdir

engine_resources.h and a stub implementation in
dummy_engine_resources.cc already existed. This adds the remaining
files from engine/common, plus a test utility that they require.

R=csharp

Bug: 830892
Change-Id: I9e1e31017331a3a7a75099cf711750c8749fbd90
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1526461
Commit-Queue: Joe Mason <joenotcharles@google.com>
Reviewed-by: Chris Sharp <csharp@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Cr-Commit-Position: refs/heads/master@{#641622}
13 files changed