Move InfoMapTest to extensions_unittests
extensions::InfoMap lives in src/extensions, so run its test suite as part of extensions_unittests.
Two tests are left in Chrome's unit_tests because they depends on the "notifications" permission being available to hosted apps.
BUG=397164
TEST=unit_tests ChromeInfoMapTest, extensions_unittests InfoMapTest
Review URL: https://codereview.chromium.org/
473913006
Cr-Commit-Position: refs/heads/master@{#291428}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@291428 0039d316-1c4b-4281-b951-d872f2087c98