Cherry-pick 7b1151e. rdar://124016968

    activeTab extension has access to page after turning the extension off, then back on
    https://bugs.webkit.org/show_bug.cgi?id=270454
    rdar://124016968

    Reviewed by Timothy Hatcher.

    When an extension is unloaded, clear the map of open tabs and windows. That will clear any active tab permissions,
    and lead to new window and tab IDs getting created if the extension is turned back on.

    While we're here, clear a bunch more extension state that should be refreshed if the extension is loaded again.

    * Source/WebKit/UIProcess/Extensions/Cocoa/WebExtensionContextCocoa.mm:
    (WebKit::WebExtensionContext::unload):

    Canonical link: https://commits.webkit.org/275651@main

Source/WebKit/UIProcess/Extensions/Cocoa/WebExtensionContextCocoa.mm

@@ -300,6 +300,22 @@ static _WKWebExtensionContextError toAPI(WebExtensionContext::Error error)
     m_extensionController = nil;
     m_contentScriptWorld = nullptr;
 
+    m_tabMap.clear();
+    m_extensionPageTabMap.clear();
+
+    m_windowMap.clear();
+    m_windowOrderVector.clear();
+    m_focusedWindowIdentifier = std::nullopt;
+
+    m_actionWindowMap.clear();
+    m_actionTabMap.clear();
+    m_defaultAction = nullptr;
+    m_popupPageActionMap.clear();
+
+    m_ports.clear();
+    m_portQueuedMessages.clear();
+    m_nativePortMap.clear();
+
     return true;
 }