Recognize _apptest files as test files in PRESUBMIT.py.

Also remove _apitest, _kiftest, and _uitest, since we don't have any of
those in our repo.

(We still have a lone _browsertest file in //base and _pixeltest files
in //cc.)

R=msw@chromium.org

Review URL: https://codereview.chromium.org/917793004

PRESUBMIT.py

diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 1db9250..08fd544 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -44,7 +44,7 @@
 _TEST_CODE_EXCLUDED_PATHS = (
     r'.*[\\\/](fake_|test_|mock_).+%s' % _IMPLEMENTATION_EXTENSIONS,
     r'.+_test_(base|support|util)%s' % _IMPLEMENTATION_EXTENSIONS,
-    r'.+_(api|browser|kif|perf|pixel|unit|ui)?test(_[a-z]+)?%s' %
+    r'.+_(app|browser|perf|pixel|unit)?test(_[a-z]+)?%s' %
         _IMPLEMENTATION_EXTENSIONS,
     r'.+profile_sync_service_harness%s' % _IMPLEMENTATION_EXTENSIONS,
     r'.*[\\\/](test|tool(s)?)[\\\/].*',