
DCHECK_EQ(0u, tiles_.size()) in TileManager destructor can fail because refs to tile could exist through |root_| WorkerPoolTask in WorkerPool::Inner. Fix by calling ScheduleRasterTasks with emtpy RootTask in ImageRasterWorkerPool::ShutDown. BUG= Review URL: https://chromiumcodereview.appspot.com/16431003 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@205510 0039d316-1c4b-4281-b951-d872f2087c98