Disable getting share handles when PIX is enabled.

PIX doesn't seem to work with share handles, so disable them when we detect that pix is enabled.

BUG=
TEST=

Review URL: https://codereview.appspot.com/5625048

git-svn-id: https://angleproject.googlecode.com/svn/trunk@982 736b8ea6-26fd-11df-bfd4-992fa37f6226
4 files changed