Remove windowName from CRWSessionController.

ios/web/navigation/navigation_manager_impl.h

Index: ios/web/navigation/navigation_manager_impl.h
diff --git a/ios/web/navigation/navigation_manager_impl.h b/ios/web/navigation/navigation_manager_impl.h
index b3d2c1e0f632aca233bca4033335009ae3936198..a015d4b3105619da041fe612070ecdf82f149fbe 100644
--- a/ios/web/navigation/navigation_manager_impl.h
+++ b/ios/web/navigation/navigation_manager_impl.h
@@ -66,9 +66,9 @@ class NavigationManagerImpl : public NavigationManager {
   // logic into it.
   void SetSessionController(CRWSessionController* session_controller);
 
-  // Initializes a new session history, supplying a unique |window_name| for the
-  // window (or nil). |opened_by_dom| is YES if the page was opened by DOM.
-  void InitializeSession(NSString* window_name, BOOL opened_by_dom);
+  // Initializes a new session history. |opened_by_dom| is YES if the page was
+  // opened by DOM.
+  void InitializeSession(BOOL opened_by_dom);
 
   // Replace the session history with a new one, where |items| is the
   // complete set of navigation items in the new history, and |current_index|