am 37703b6c: invalidate the webview after pressing the IME \'next\' button

Merge commit '37703b6c875a935e6341d8a710796bc0c87d3044' into eclair-plus-aosp

* commit '37703b6c875a935e6341d8a710796bc0c87d3044':
  invalidate the webview after pressing the IME 'next' button