Rebaseline imagemagnifier and dropshadowimagefilter tests.

expectations/gm/Test-Mac10.6-MacMini4.1-GeForce320M-x86_64-Debug/expected-results.json

 {
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   }, 
   "expected-results": {
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       "allowed-digests": [
@@ skipping 7110 matching lines @@
       ], 
       "bugs": [
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         [
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@@ skipping 3993 matching lines @@
           "bitmap-64bitMD5", 
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         ]
       ], 
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       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
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+          11229304184160975726
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         [
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     "imagemagnifier_pdf-mac.png": {
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         [
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     "imagemagnifier_pdf-poppler.png": {
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@@ skipping 6867 matching lines @@
       "allowed-digests": [
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       "reviewed-by-human": true
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 }