ui: Fix the test names for ui/aura and ui/base.

Brett prefers we go with foo_unittests, it makes Windows users life
easier. And others easier, so they don't need to know/remember the other
possibility: /path/to:unittests

BUG=None
TEST=gn gen out_gn/Debug && ninja -C out_gn/Debug aura_unittests
ui_unittests
R=brettw@chromium.org
TBR=sky@chromium.org

Review URL: https://codereview.chromium.org/601753003

Cr-Commit-Position: refs/heads/master@{#297128}

ui/aura/BUILD.gn

@@ -273,8 +273,7 @@ executable("bench") {
   }
 }
 
-test("unittests") {
-  output_name = "aura_unittests"
+test("aura_unittests") {
   sources = [
     "gestures/gesture_recognizer_unittest.cc",
     "test/run_all_unittests.cc",

ui/base/BUILD.gn

@@ -701,15 +701,14 @@ if (is_android) {
 
 # TODO(GYP): Make this work on Android and reenable it.
 if (!is_android) {
+# TODO(tfarina): Rename this target to ui_base_unittests.
+# In order to do this we will need to keep this target, add a dummy
+# ui_base_unittests target that just points to ui_unittests, change
+# buildbot code to reference the new 'ui_base_unittests' target.
+# After buildbot is updated, we can make the changes in Chromium and
+# remove 'ui_unittests' target. crbug.com/331829
 # GYP version: ui/base/ui_base_tests.gyp:ui_unittests
-test("unittests") {
-  # TODO(tfarina): Rename this target to ui_base_unittests.
-  # In order to do this we will need to keep this target, add a dummy
-  # ui_base_unittests target that just points to ui_unittests, change
-  # buildbot code to reference the new 'ui_base_unittests' target.
-  # After buildbot is updated, we can make the changes in Chromium and
-  # remove 'ui_unittests' target. crbug.com/331829
-  output_name = "ui_unittests"
+test("ui_unittests") {
   sources = [
     "l10n/l10n_util_mac_unittest.mm",
     "l10n/l10n_util_unittest.cc",