hash code cleanup - copy seed to local and use array indexing.  1.483 ms for 720p vs 2.225 ms for old code. BUG=none TEST=none Review URL: https://chromiumcodereview.appspot.com/10052036
hash code cleanup - copy seed to local and use array indexing.  1.483 ms for 720p vs 2.225 ms for old code.
BUG=none
TEST=none
Review URL: https://chromiumcodereview.appspot.com/10052036

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@131901 0039d316-1c4b-4281-b951-d872f2087c98

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