Multi-tab: Renaming NotifySelectionChanged to NotifyActiveTabChanged
Reasons for renaming
1) The old name no longer reflects the cause of the notification.
2) A new NotifySelectionChanged method will be written (in
http://codereview.chromium.org/
6933037/) to notify observers which tabs
were affected (either selected or deselcted) by a selection change.
BUG=NONE
TEST=NONE
Review URL: http://codereview.chromium.org/
6965019
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@87344 0039d316-1c4b-4281-b951-d872f2087c98