Avoid recreating constant vertex buffers unnecessarily.

To avoid continually recreating constant vertex buffers instead use streaming buffers to hold that data.

BUG=
TEST=

Review URL: http://codereview.appspot.com/4437072

git-svn-id: https://angleproject.googlecode.com/svn/trunk@744 736b8ea6-26fd-11df-bfd4-992fa37f6226
3 files changed