Remove CRWSessionController usage from BrowserViewController.

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

Index: ios/web/public/test/fakes/test_navigation_manager.mm
diff --git a/ios/web/public/test/fakes/test_navigation_manager.mm b/ios/web/public/test/fakes/test_navigation_manager.mm
index 954d59afa2bccb5c7c6f0ec68f7bdb49884ca61f..d33f46ae079f3cedad255ab87ca096a219457738 100644
--- a/ios/web/public/test/fakes/test_navigation_manager.mm
+++ b/ios/web/public/test/fakes/test_navigation_manager.mm
@@ -127,10 +127,25 @@
   NOTREACHED();
 }
 
+NavigationItemList TestNavigationManager::GetBackwardItems() const {
+  NOTREACHED();
+  return NavigationItemList();
+}
+
+NavigationItemList TestNavigationManager::GetForwardItems() const {
+  NOTREACHED();
+  return NavigationItemList();
+}
+
 void TestNavigationManager::Reload(bool check_for_repost) {
   NOTREACHED();
 }
 
+void TestNavigationManager::InsertStateFromManager(
+    const web::NavigationManager* manager) {
+  NOTREACHED();
+}
+
 void TestNavigationManager::OverrideDesktopUserAgentForNextPendingItem() {
   NOTREACHED();
 }