Detect SSE2 and return if not present to avoid a crash. BUG=none TEST=run o3d on Pentium3.  Voice and Settings page should work. Review URL: http://codereview.chromium.org/6708057
Detect SSE2 and return if not present to avoid a crash.
BUG=none
TEST=run o3d on Pentium3.  Voice and Settings page should work.
Review URL: http://codereview.chromium.org/6708057

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@78916 0039d316-1c4b-4281-b951-d872f2087c98

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