TabPickerViewController: Refactor to not reference tab controller directly.

App/Tabs/Tab.swift

@@ -17,6 +17,17 @@ class Tab: NSObject, SBRProcessBundleBridgeDelegate
 {
     public weak var delegate: TabDelegate?
     
+    public var tabInfo: TabInfo {
+        get {
+            TabInfo(
+                title: loadedWebView?.title,
+                url: loadedWebView?.url ?? self.homeURL,
+                favicon: self.favicon,
+                identifier: self.identifier
+            )
+        }
+    }
+    
     public let homeURL: URL?
     public let bridge: ProcessBundleBridge
     public var webView: WKWebView {
@@ -33,8 +44,8 @@ class Tab: NSObject, SBRProcessBundleBridgeDelegate
     public var policyManager: ResourcePolicyManager
     
     private var loadedWebView: WKWebView? = nil
-    public var title: String? { loadedWebView?.title }
-    public var url: URL?      { loadedWebView?.url ?? self.homeURL }
+    public var title: String? { get { tabInfo.title } }
+    public var url: URL?      { get { tabInfo.url } }
     
     public var javaScriptEnabled: Bool = false {
         didSet { bridge.allowAllScripts = javaScriptEnabled }