Gardening. Mark compositing/lots-of-img-layers* Slow to see if they pass.
Gardening. Mark compositing/lots-of-img-layers* Slow to see if they pass.

TBR=kbr
BUG=49629

Review URL: https://codereview.chromium.org/17303002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@152574 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs