Oilpan: Remove raw pointer to AXObject from IgnoredReason
Oilpan: Remove raw pointer to AXObject from IgnoredReason

BUG=509911

Review URL: https://codereview.chromium.org/1241573003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@199307 bbb929c8-8fbe-4397-9dbb-9b2b20218538

Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk