am c06a2da3: Merge change I4c7be8c7 into eclair-mr2

Merge commit 'c06a2da38a76eac4221f47cf17fccb27dc757fed' into eclair-mr2-plus-aosp

* commit 'c06a2da38a76eac4221f47cf17fccb27dc757fed':
  Notify the WebView that its customView is not being displayed instead of failing silently.