SimpleMenuModel and ButtonMenuItemModel implement AcceleratorProvider.
(Actually applies to their Delegate classes, not those classes
themselves.) These classes were providing the full AcceleratorProvider
interface, so may as well officially implement it. This cleans up some
awkward subclasses that inherit both AcceleratorProvider and
SimpleMenuModel::Delegate and override the same method in both.
BUG=627344
Review-Url: https://codereview.chromium.org/2138353002
Cr-Commit-Position: refs/heads/master@{#409138}
5 files changed
