First round of matrixconvolution rebaselines.

expectations/gm/Test-Mac10.7-MacMini4.1-GeForce320M-x86-Release/expected-results.json

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@@ skipping 9203 matching lines @@
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@@ skipping 4376 matching lines @@
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       ], 
       "bugs": [
         1578
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       "reviewed-by-human": false
     }
   }
 }