Fix for crash in <select> drop down

Bug 11653861

Apply a safe spot fix for class cast exception. This makes the select
dialog at least useable.

Change-Id: Idfcc62fac65bb34abbe8ba74b26a6a26c2b34035

BUG=https://code.google.com/p/android/issues/detail?id=62128

Review URL: https://codereview.chromium.org/86823002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237406 0039d316-1c4b-4281-b951-d872f2087c98
chromeos: Acknowledge power button presses.

Call powerd's HandlePowerButtonAcknowledgment D-Bus method
after a power-button-down event has been handled.

BUG=298983

Review URL: https://codereview.chromium.org/88373002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237407 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237407