Make the HistoryMenuBridge::HistoryItem co-own the NSMenuItem. This hopefully fixes a top-crash.

BUG=46289
TEST=Open 3 windows, with 10-12 tabs in each. Cmd+W rapidly. Chrome doesn't crash. See bug for details.

Review URL: http://codereview.chromium.org/2836008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@50134 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed