Remove Infobars notifications from GoogleURLTrackerMapEntry
The InfoBarManager::Observer() is used instead.
GoogleURLTrackerMapEntry now makes actual calls on the InfoBarManager (to
register and unregister as an observer). This has some consequences:
- the |infobar_manager_| pointer is no longer const
- the unittest has to create actual instances of InfoBarManager instead of
using placeholder integers.
BUG=373243
Review URL: https://codereview.chromium.org/
290453005
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274510 0039d316-1c4b-4281-b951-d872f2087c98