Rebaseline from recent gpu optimization changes

expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Debug/expected-results.json

 {
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           12831071530564277917
         ]
       ], 
       "bugs": [
@@ skipping 11428 matching lines @@
           "bitmap-64bitMD5", 
           683358655251706777
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "gradients_view_perspective_msaa16.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          12251179949487160659
+          16307177227728636543
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "gradients_view_perspective_nvprmsaa4.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           2583075582908960098
         ]
@@ skipping 7577 matching lines @@
           14019814087375927425
         ]
       ], 
       "bugs": [
         1935
       ], 
       "reviewed-by-human": false
     }
   }
 }