* refactor: use private inheritance in PushNotifications
* refactor: use private inheritance in electron::api::App
* refactor: use private inheritance in electron::api::BrowserWindow
* refactor: use private inheritance in electron::api::NativeTheme
* refactor: use private inheritance in electron::api::Tray
* refactor: use private inheritance in electron::api::Session
* refactor: use private inheritance in electron::api::WebContents
* refactor: use private inheritance in electron::api::DownloadItem
* refactor: use private inheritance in electron::api::MenuBar
* refactor: use private inheritance in ClearDataOperation
* refactor: use private inheritance in electron::api::Screen
* refactor: use private inheritance in electron::ElectronDesktopWindowTreeHostLinux
* refactor: use private inheritance in SpellCheckerHolder
* refactor: use private inheritance in electron::api::PowerMonitor
* refactor: use private inheritance in electron::api::BaseWindow
* refactor: use private inheritance in electron::api::AutoUpdater
* refactor: use private inheritance in electron::api::Menu
* refactor: use private inheritance in electron::api::NativeWindowViews
* refactor: use private inheritance in electron::ElectronBrowserClient
* refactor: use private inheritance in electron::AutofillPopupView
* refactor: use private inheritance in GtkMessageBox
* refactor: use private inheritance in electron::OffScreenRenderWidgetHostView
* refactor: use private inheritance in electron::InspectableWebContents
* refactor: use private inheritance in electron::ElectronUsbDelegate
* refactor: use private inheritance in electron::LoginHandler
* refactor: use private inheritance in WebFrameRenderer
* refactor: use private inheritance in electron::ElectronSerialDelegate
* refactor: use private inheritance in electron::ClientFrameViewLinux
* refactor: use private inheritance in electron::ElectronHidDelegate
* refactor: use private inheritance in IPCRenderer
* refactor: use private inheritance in electron::WinCaptionButtonContainer
* refactor: use private inheritance in electron::ElectronApiIPCHandlerImpl
* refactor: use private inheritance in electron::api::ServiceWorkerContext
* refactor: use private inheritance in ui::FileSelectHelper
* refactor: use private inheritance in electron::api::WebContentsView
* refactor: use private inheritance in electron::api::SimpleURLLoaderWrapper
* refactor: use private inheritance in electron::api::InAppPurchase
* refactor: use private inheritance in electron::api::Debugger
* refactor: use private inheritance in electron::ElectronWebContentsUtilityHandlerImpl
* refactor: use private inheritance in electron::OffScreenWebContentsView
refactor: sync api::Screen getter sigs to upstream
ui::Display GetAllDisplays(), GetPrimaryDisplay(), GetDisplayMatching(),
and GetDisplayNearestPoint() methods are all const, so make our wrappers
const too.
ui::Display GetAllDisplays() returns a const reference, so make our
wrapper return a const reference too. This avoids creating a new
std::vector<display::Display> each time it's called.
