am 588f93d3: am 6a3969cc: Removed mutex lock in addTextSource, and rename to addTextSource_l to indicate this method needs to be called with a lock hold.

* commit '588f93d3130774056a8c568e31adeac29eb84579':
  Removed mutex lock in addTextSource, and rename to addTextSource_l to indicate this method needs to be called with a lock hold.