gm self-test: make all test cases exercise transparency

gm/tests/run.sh

 #!/bin/bash
 
 # Self-tests for gm, based on tools/tests/run.sh
 #
 # These tests are run by the Skia_PerCommit_House_Keeping bot at every commit,
 # so make sure that they still pass when you make changes to gm!
 #
 # TODO: because this is written as a shell script (instead of, say, Python)
 # it only runs on Linux and Mac.
 # See https://code.google.com/p/skia/issues/detail?id=677
@@ skipping 136 matching lines @@
 gm_test "--hierarchy --match selftest1 $CONFIGS -r $GM_INPUTS/json/different-pixels.json" "$GM_OUTPUTS/compared-against-different-pixels-json"
 
 # Compare generated image against an empty "expected image" dir.
 gm_test "--hierarchy --match selftest1 $CONFIGS -r $GM_INPUTS/images/empty-dir" "$GM_OUTPUTS/compared-against-empty-dir"
 
 # If run without "-r", the JSON's "actual-results" section should contain
 # actual checksums marked as "failure-ignored", but the "expected-results"
 # section should be empty.
 gm_test "--hierarchy --match selftest1 $CONFIGS" "$GM_OUTPUTS/no-readpath"
 
-# Run a test which generates partially transparent images, write out those
-# images, and read them back in.
-#
-# This test would have caught

[epoger, 2013/03/01 17:24:52]

Not needed anymore, because the "selftest" tests now exercise partially
transparent images.  And they are far simpler than aaclip, meaning that their
results should be unchanged across platforms and revisions.

-# http://code.google.com/p/skia/issues/detail?id=1079 ('gm generating
-# spurious pixel_error messages as of r7258').
-#
-# TODO(epoger): Disabled pending https://code.google.com/p/skia/issues/detail?id=1142
-# ('gm self-tests: aaclip checksums failing')
-#
-#IMAGEDIR=$GM_TEMPFILES/aaclip-images
-#rm -rf $IMAGEDIR
-#mkdir -p $IMAGEDIR
-#gm_test "--match simpleaaclip_path $CONFIGS -w $IMAGEDIR" "$GM_OUTPUTS/aaclip-write"
-#gm_test "--match simpleaaclip_path $CONFIGS -r $IMAGEDIR" "$GM_OUTPUTS/aaclip-readback"
-
 echo "All tests passed."