Take care of a bunch of pending GPU rebaselines and remove tests from ignored-tests.txt

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

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@@ skipping 5973 matching lines @@
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@@ skipping 210 matching lines @@
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@@ skipping 210 matching lines @@
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@@ skipping 763 matching lines @@
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@@ skipping 7770 matching lines @@
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@@ skipping 369 matching lines @@
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 }