am 94ab3b6d: Expose WebViewClient of WebView.

Merge commit '94ab3b6d0e9a5a914c7706ed1888c9d27756f7e4' into eclair-mr2-plus-aosp

* commit '94ab3b6d0e9a5a914c7706ed1888c9d27756f7e4':
  Expose WebViewClient of WebView.