GitLab

This patch is the first part of ensuring that recycle tree does not
contain any unshared tiles.

This is done by ensuring that we invalidate the soon to become recycled
tiling while activating.

BUG=393802
R=danakj

Review URL: https://codereview.chromium.org/397303003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283951 0039d316-1c4b-4281-b951-d872f2087c98