Assigned to the concern owner from Predator results --
The result is a list of CLs that change the crashed files. 

Author: bruthig
Project: chromium
Changelist: https://chromium.googlesource.com/chromium/src/+/854a6b15453fce54325ecfe2611a4c854ad7573c
Time: Mon Jun 20 13:15:40 2016
File bubble_icon_view.cc is changed in this cl (and is part of stack frame #4, "BubbleIconView::OnKeyReleased")
Minimum distance from crash line to modified line: 15. (file: bubble_icon_view.cc, crashed on: 125, modified: 110).

@bruthig -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.

I'm pretty sure this crash isn't related to my change.

It appears that |web_contents| is null in 'GetURLToBookmark chrome/browser/ui/bookmarks/bookmark_utils.cc:109:61'.  Following up the stack trace |web_contents| is retrieved in chrome::BookmarkCurrentPageIgnoringExtensionOverrides(Browser*) chrome/browser/ui/browser_commands.cc on line 772 via TabStripModel::GetActiveWebContents().

I suspect the TabStripModel::active_index() is getting out of sync and TabStripModel::GetWebContentsAt() is returning null.

Assigning to sky@ as an OWNER of tab_strip_model.cc to help triage further.