CodeHealth: Remove chrome/test from NOT_CONVERTED_TO_MODERN_BIND* list.

Removes '^chrome/test/chromedriver/server/http_handler.cc' from the
_NOT_CONVERTED_TO_MODERN_BIND_AND_CALLBACK list in src/PRESUBMIT.py,
as the chrome/test directory has now been fully converted.

Bug: 1007643
Change-Id: Ib57bcb674ac8c26c7ad5553267194cecd590591d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2626176Reviewed-by: Charlie Reis <creis@chromium.org>
Commit-Queue: Cammie Smith Barnes <cammie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843312}

PRESUBMIT.py

@@ -375,7 +375,6 @@ _NOT_CONVERTED_TO_MODERN_BIND_AND_CALLBACK = '|'.join((
   '^chrome/browser/translate/',
   '^chrome/browser/web_applications/',
   '^chrome/browser/win/',
-  '^chrome/test/chromedriver/server/http_handler.cc',
   '^chromeos/components/',
   '^components/drive/',
   '^components/search_engines/',