rebase from early clip

expectations/gm/Test-Win7-ShuttleA-HD2000-x86-Debug/expected-results.json

 {
   "actual-results": {
     "failed": null, 
     "failure-ignored": null, 
     "no-comparison": null, 
     "succeeded": null
   }, 
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
@@ skipping 3818 matching lines @@
           "bitmap-64bitMD5", 
           12832097210600987517
         ]
       ], 
       "ignore-failure": false
     }, 
     "complexclip2_path_aa_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          4355776770795120125
+          3115058516977276508
         ]
       ], 
       "reviewed-by-human": true
     }, 
     "complexclip2_path_aa_pdf-poppler.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           16333624854177111429
         ]
@@ skipping 9881 matching lines @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           12937422788648264516
         ]
       ], 
       "reviewed-by-human": true
     }
   }
 }