Minor fix for GLES2
Minor fix for GLES2

Needs unit test but unfortunately that unit test needs
some rather large setup to test so for now just checking
in the fix.

TEST=none
BUG=none

Review URL: http://codereview.chromium.org/525039

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@35608 0039d316-1c4b-4281-b951-d872f2087c98

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