Remove all M20 incompatible features in GPU blacklist.

Remove all M20 incompatible features in GPU blacklist.

So the ToT should never roll to this revision.  This is for merging back to M20 only.  Once I commit this, I'll revert it immediately.

BUG=134015
TEST=about:gpu and see gpu blacklisted on 2010 Macbook Air
R=kbr
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=144530

[Ken Russell (switch to Gerrit), 2012-06-27 20:08:39]

LGTM but I wonder whether you should consider just checking out the M20
workspace and applying this change there directly.

[Zhenyao Mo, 2012-06-27 20:09:59]

On 2012/06/27 20:08:39, kbr wrote:
> LGTM but I wonder whether you should consider just checking out the M20
> workspace and applying this change there directly.

We have to do it this way, because the branch simply pulled down a revision of
the file through DEPS, so there isn't a checked in file we can modify directly
on the branch