Moved |openedByDOM| to WebState's CreateParams and public interface.

ios/web/navigation/navigation_manager_impl_unittest.mm

Index: ios/web/navigation/navigation_manager_impl_unittest.mm
diff --git a/ios/web/navigation/navigation_manager_impl_unittest.mm b/ios/web/navigation/navigation_manager_impl_unittest.mm
index 38394c937603ad695921d37fd62384cc3dc0aa05..effc1a8ae9e6c81420dcb039fe2d7a6eeb43110a 100644
--- a/ios/web/navigation/navigation_manager_impl_unittest.mm
+++ b/ios/web/navigation/navigation_manager_impl_unittest.mm
@@ -33,9 +33,8 @@ void OnNavigationItemCommitted(const LoadCommittedDetails&) override {}
   NavigationManagerTest() : manager_(new NavigationManagerImpl()) {
     manager_->SetDelegate(&delegate_);
     manager_->SetBrowserState(&browser_state_);
-    controller_.reset([[CRWSessionController alloc]
-        initWithBrowserState:&browser_state_
-                 openedByDOM:NO]);
+    controller_.reset(
+        [[CRWSessionController alloc] initWithBrowserState:&browser_state_]);
     manager_->SetSessionController(controller_.get());
   }
   CRWSessionController* session_controller() { return controller_.get(); }