GitLab

Split language code type correction logic to an independent static
function. Then, apply unit tests to confirm that the logic correct
well-known mal-formed language code.

BUG=175673
TEST=unit_tests --gtest_filter'TranslateHelperTest.LanguageCodeTypoCorrection'

Review URL: https://codereview.chromium.org/12221085

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@182459 0039d316-1c4b-4281-b951-d872f2087c98