am 10be7542: If the textfield is offscreen at the end of a zoom, remove it.

Merge commit '10be7542327e1d4483b33730164e5404ed48d73e' into eclair-plus-aosp

* commit '10be7542327e1d4483b33730164e5404ed48d73e':
  If the textfield is offscreen at the end of a zoom, remove it.