Make a handful of files in chrome/test/base OWNERS=*

Any change to the superclass of these files generally results in having
to touch the test subclasses. More often than not the changes are trivial:
add a no-op override. This patch opens these files to *. Additionally I'm
removing myself from chrome/test. I'm already in chrome/OWNERS and wouldn't
mind balancing the load a bit more.

BUG=none
TEST=none

Change-Id: I1d8fe5b1b6d715c4002da4192d9e641cb29271c9
Reviewed-on: https://chromium-review.googlesource.com/1175056Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583016}

chrome/test/OWNERS

-sky@chromium.org
-
 # If you're doing structural changes get a review from one of the OWNERS.
 per-file BUILD.gn=*

chrome/test/base/OWNERS

+# If you're doing anything interesting to these, please get a review for an
+# OWNER.
+per-file test_browser_window.*=*
+per-file testing_browser_process.*=*
+per-file testing_profile.*=*
+
 per-file js2gtest.*=dtseng@chromium.org
 per-file javascript_browser_test.*=dtseng@chromium.org