Fix use-after-free in ~TextureInfo

In some paths, the TextureInfo (refcounted) may outlive the TextureManager,
accessing a stale pointer in its destructor. This fixes it.

BUG=chromium-os:25634
TEST=pepper flash, reload videos many times.


Review URL: http://codereview.chromium.org/9374004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@121188 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed