cc: Don't check IsLost for PrioritizedResources.

If a resource is lost, it's in the parent compositor forever, so
deleting the resource will not free the data neccessarily, and we
can never reuse the texture. Simplify things by just checking
IsUseByConsumer() and not checking for !IsLost().

R=ccameron, piman
BUG=292971

Review URL: https://codereview.chromium.org/44813005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231224 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 231224