rebaselines for imageblur, imagemagnifier, and still some for gradient_radial2

expectations/gm/Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Debug/expected-results.json

 {
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   "expected-results": {
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       "allowed-digests": [
@@ skipping 9509 matching lines @@
       ], 
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       "allowed-digests": [
         [
@@ skipping 171 matching lines @@
       ], 
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         1578
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     "imagemagnifier_pdf-mac.png": {
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         1578
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       "reviewed-by-human": false
     }, 
     "imagemagnifier_pdf-poppler.png": {
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     "internal_links_565.png": {
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         [
@@ skipping 5293 matching lines @@
           10424380103329133154
         ]
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       "bugs": [
         1578
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 }