Add master.chromium to tests/masters_recipes_test.py
Add master.chromium to tests/masters_recipes_test.py

BUG=380709, 545480

Review URL: https://codereview.chromium.org/1456423002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@297645 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build