add missing externs to repo

externs/webextension_polyfill/webnavigation/Static.hx

@@ -0,0 +1,52 @@
+package webextension_polyfill.webnavigation;
+
+typedef Static = {
+	/**
+		Retrieves information about the given frame. A frame refers to an <iframe> or a <frame> of a web page and is
+		identified by a tab ID and a frame ID.
+	**/
+	function getFrame(details:GetFrameDetailsType):js.lib.Promise<Null<GetFrameCallbackDetailsType>>;
+	/**
+		Retrieves information about all frames of a given tab.
+	**/
+	function getAllFrames(details:GetAllFramesDetailsType):js.lib.Promise<Null<Array<GetAllFramesCallbackDetailsItemType>>>;
+	/**
+		Fired when a navigation is about to occur.
+	**/
+	var onBeforeNavigate : OnBeforeNavigateEvent;
+	/**
+		Fired when a navigation is committed. The document (and the resources it refers to, such as images and subframes)
+		might still be downloading, but at least part of the document has been received from the server and the browser has
+		decided to switch to the new document.
+	**/
+	var onCommitted : OnCommittedEvent;
+	/**
+		Fired when the page's DOM is fully constructed, but the referenced resources may not finish loading.
+	**/
+	var onDOMContentLoaded : OnDOMContentLoadedEvent;
+	/**
+		Fired when a document, including the resources it refers to, is completely loaded and initialized.
+	**/
+	var onCompleted : OnCompletedEvent;
+	/**
+		Fired when an error occurs and the navigation is aborted. This can happen if either a network error occurred,
+		or the user aborted the navigation.
+	**/
+	var onErrorOccurred : OnErrorOccurredEvent;
+	/**
+		Fired when a new window, or a new tab in an existing window, is created to host a navigation.
+	**/
+	var onCreatedNavigationTarget : OnCreatedNavigationTargetEvent;
+	/**
+		Fired when the reference fragment of a frame was updated. All future events for that frame will use the updated URL.
+	**/
+	var onReferenceFragmentUpdated : OnReferenceFragmentUpdatedEvent;
+	/**
+		Fired when the contents of the tab is replaced by a different (usually previously pre-rendered) tab.
+	**/
+	var onTabReplaced : webextension_polyfill.events.Event<(details:OnTabReplacedDetailsType) -> Void>;
+	/**
+		Fired when the frame's history was updated to a new URL. All future events for that frame will use the updated URL.
+	**/
+	var onHistoryStateUpdated : OnHistoryStateUpdatedEvent;
+};