Convert React ContextMenu items to native context menu

[bsclifton]

This issue is meant to track places which use our React component which we can convert to using native context menus. This works great on Windows and Linux, but macOS causes video to freeze when the context menu is presented. The above PR makes that process async

Places we can update:

• new tab button (completed with Make new tab context menu native #8397)
• reload / stop button (has reload / clean reload, Convert reload context menu to native context menu #9571)
• menubar on Windows (we should be able to do this now, since the PR above is macOS only)
  ... TODO: document other places...

Places we can consider updating (which have moderate difficulty):

• Bookmarks toolbar folders (would require us to load favicons into the context menu). This would fix Nested bookmark folders go off screen in bookmarks toolbar #4745
  ... TODO: document other places...

Places which we shouldn't change (requires a lot of extra work to do natively):

• Hamburger / Kabob menu (since it has zoom buttons; this would require OS specific code)
• Back / Forward navigation already have a different UI planned. See Interface needs facelift on history shown when long press on nav back/forward #2737

cc: @liunkae

[cndouglas]

@bsclifton What about the Windows menubar?

[bsclifton]

@liunkae that would be a REALLY nice one actually! Good catch 😄

(please edit the original post if needed)

[darkdh]

I do see something about drag and drop handling in MenuController of ui/views/controls/menu/menu_controller.cc

[bsclifton]

@liunkae did you want to redo the reload/stop button with native context menu? I remember you had originally submitted the PR with it as a native menu, but we changed back (at my request, since macOS menus were sync at the time)

[cndouglas]

Sure. I opened #9571 for this.