Quote the path to the temporary file containing the Cg shader to fix problems in particular on Windows XP where the temporary directory path contains spaces.
Quote the path to the temporary file containing the Cg shader to fix
problems in particular on Windows XP where the temporary directory
path contains spaces.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/1872003

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@46277 0039d316-1c4b-4281-b951-d872f2087c98

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