Re-enable StructSequence/OobeLocalizationTest on chrome-branded linux-chromeos.

Bug: 977170
Change-Id: I79acbb3d4f1fd13449c515b8fc7e8731bf470296
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1819561
Auto-Submit: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Achuith Bhandarkar <achuith@chromium.org>
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Cr-Commit-Position: refs/heads/master@{#698990}

testing/buildbot/filters/chromeos.browser_tests.filter

@@ -29,11 +29,6 @@
 # TODO(crbug.com/990819): Enable this.
 -StructSequence/OobeLocalizationTest.LocalizationTest/0
 
-# TODO(crbug.com/977170): Enable this.
--StructSequence/OobeLocalizationTest.LocalizationTest/3
--StructSequence/OobeLocalizationTest.LocalizationTest/4
--StructSequence/OobeLocalizationTest.LocalizationTest/8
-
 # TODO(crbug.com/978051): Enable this.
 -TabManagerTestWithTwoTabs.TabProactiveDiscardAndFocusBeforeFreezeCompletes