Bug 1608834 - [taskgraph] Enable taskgraph chunking for mochitest-browser-chrome, r=jmaher

Differential Revision: https://phabricator.services.mozilla.com/D62931

--HG--
extra : moz-landing-system : lando

taskcluster/taskgraph/transforms/tests.py

@@ -1284,7 +1284,6 @@ CHUNK_SUITES_BLACKLIST = (
     'jittest',
     'jsreftest',
     'marionette',
-    'mochitest-browser-chrome',
     'mochitest-browser-chrome-screenshots',
     'mochitest-browser-chrome-thunderbird',
     'mochitest-valgrind-plain',