Rebaseline minor pixel diffs from recent GPU changes.

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

 {
   "expected-results": {
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       "bugs": [
@@ skipping 997 matching lines @@
       ], 
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         2146
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     }, 
     "bitmapsource_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          57587603894657817
+          17102914554317403380
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       "bugs": [
         2146
       ], 
       "reviewed-by-human": false
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     "bitmapsource_pdf-poppler.png": {
       "allowed-digests": [
         [
@@ skipping 75 matching lines @@
       ], 
       "bugs": [
         2146
       ], 
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         2146
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     "blurquickreject_pdf-poppler.png": {
       "allowed-digests": [
         [
@@ skipping 1755 matching lines @@
       ], 
       "bugs": [
         2146
       ], 
       "reviewed-by-human": false
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     "blurrects_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
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       "bugs": [
         2146
       ], 
       "reviewed-by-human": false
     }, 
     "blurrects_pdf-poppler.png": {
       "allowed-digests": [
         [
@@ skipping 591 matching lines @@
       ], 
       "bugs": [
         2146
       ], 
       "reviewed-by-human": false
     }, 
     "colorfilterimagefilter_gpu.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
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       "bugs": [
         2146
       ], 
       "reviewed-by-human": false
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     "colorfilterimagefilter_pdf-poppler.png": {
       "allowed-digests": [
         [
@@ skipping 642 matching lines @@
       ], 
       "bugs": [
         2146
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         2146
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     "convex_poly_clip_pdf-poppler.png": {
       "allowed-digests": [
         [
@@ skipping 5535 matching lines @@
       ], 
       "bugs": [
         2146
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     "pathinvfill_pdf-poppler.png": {
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@@ skipping 2208 matching lines @@
       ], 
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         [
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       "bugs": [
         2146
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       "reviewed-by-human": false
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     "strokes_poly_pdf-poppler.png": {
       "allowed-digests": [
         [
@@ skipping 999 matching lines @@
       ], 
       "bugs": [
         2146
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       "reviewed-by-human": false
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     "xfermodeimagefilter_gpu.png": {
       "allowed-digests": [
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       "bugs": [
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       "reviewed-by-human": false
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     "xfermodeimagefilter_pdf-poppler.png": {
       "allowed-digests": [
         [
@@ skipping 97 matching lines @@
           15843716056234692659
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       "bugs": [
         2146
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   }
 }