Replace use of deprecated CG methods.

expectations/gm/Test-Mac10.7-MacMini4.1-GeForce320M-x86_64-Release/expected-results.json

 {
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@@ skipping 5229 matching lines @@
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@@ skipping 2948 matching lines @@
       ], 
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@@ skipping 6088 matching lines @@
           "bitmap-64bitMD5", 
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     "shadertext2_gpu.png": {
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@@ skipping 2818 matching lines @@
       "allowed-digests": [
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 }