Revert 124954 - Disable certain gpu feature tests for certain bots.
Revert 124954 - Disable certain gpu feature tests for certain bots.

Canvas2D is not supported on XP.
Multisampling is not supported in Linux Intel.

BUG=
TEST=gpu waterfall, XP bots, Linux Intel bot
R=jbates
Review URL: https://chromiumcodereview.appspot.com/9582033

TBR=zmo@chromium.org
Review URL: https://chromiumcodereview.appspot.com/9578019

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@124960 0039d316-1c4b-4281-b951-d872f2087c98

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