eda6ea6e51
This commit removes nsIRemoteTab as a parent class from BrowserParent, so that BrowserHost is the only concrete implementation of nsIRemoteTab. Some static_cast's are updated to cast to BrowserHost, and other places have to be updated to pass a BrowserHost instead of a BrowserParent. WindowGlobalParent had a getter to return it's managing BrowserParent as a nsIRemoteTab. I couldn't find a use of this in-tree, so I've just opt-ed to remove it. If there's a use-case, we can add something back in. Differential Revision: https://phabricator.services.mozilla.com/D31444