Re-enable ManuallyCloseMessageCenter in linux aura builds.

Test tuns without errors or warning on my machine.

BUG=163931

Review URL: https://codereview.chromium.org/163433014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251543 0039d316-1c4b-4281-b951-d872f2087c98
GPU: Adjust memory and use the soft-limit.

We now have a soft limit, so we adjust some memory limits up,
and enable the soft-limit to bring the effective usage down.

Initially we bump most limits up a bit (except for really
high-end which is already at 256MB), and then we cut the
soft limit to 50% of that. For low-end, to be extra careful
we only increase the limit from 8MB to 12MB, and set the
soft limit back to 8MB.

BUG=337940,273127
TBR=piman@chromium.org

Review URL: https://codereview.chromium.org/168053002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251544 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251543
SafeBrowsing DownloadProtectionService: only check final URL against whitelist.

BUG=none

Review URL: https://codereview.chromium.org/166223004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251545 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251545