Remove CRWSessionController usage from BrowserViewController.

ios/web/public/test/fakes/test_navigation_manager.h

Index: ios/web/public/test/fakes/test_navigation_manager.h
diff --git a/ios/web/public/test/fakes/test_navigation_manager.h b/ios/web/public/test/fakes/test_navigation_manager.h
index 812077a4bf06379aaebdc39fbebcdb0ab213f76f..35947fb82f0007a63b0feeccf847604c7bd7421b 100644
--- a/ios/web/public/test/fakes/test_navigation_manager.h
+++ b/ios/web/public/test/fakes/test_navigation_manager.h
@@ -11,7 +11,7 @@ namespace web {
 
 // A minimal implementation of web::NavigationManager that raises NOTREACHED()
 // on most calls.
-class TestNavigationManager : public web::NavigationManager {
+class TestNavigationManager : public NavigationManager {
  public:
   TestNavigationManager();
   ~TestNavigationManager() override;
@@ -38,7 +38,10 @@ class TestNavigationManager : public web::NavigationManager {
   void GoBack() override;
   void GoForward() override;
   void GoToIndex(int index) override;
+  NavigationItemList GetBackwardItems() const override;
+  NavigationItemList GetForwardItems() const override;
   void Reload(bool check_for_reposts) override;
+  void InsertStateFromManager(const NavigationManager* manager) override;
   void OverrideDesktopUserAgentForNextPendingItem() override;
 
   // Setters for test data.