GitLab

Added 'error logs' tab.  For now, simply TranslateErrors::Type is logged.  More error details will be logged when we can get those from Translate API.

BUG=175967
TEST=manual

Review URL: https://chromiumcodereview.appspot.com/15881006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@202804 0039d316-1c4b-4281-b951-d872f2087c98