Revert of Set user agent type of transient item the same as pending item.

ios/web/public/test/web_test_with_web_state.h

Index: ios/web/public/test/web_test_with_web_state.h
diff --git a/ios/web/public/test/web_test_with_web_state.h b/ios/web/public/test/web_test_with_web_state.h
index bf9f29f3cb15b8bc3433865f2aa5eb43bbeb453a..b167056f398810c4538c4f91c8b2ff65a5f34798 100644
--- a/ios/web/public/test/web_test_with_web_state.h
+++ b/ios/web/public/test/web_test_with_web_state.h
@@ -8,7 +8,6 @@
 #import "base/ios/block_types.h"
 #include "base/message_loop/message_loop.h"
 #include "ios/web/public/test/web_test.h"
-#include "ui/base/page_transition_types.h"
 #include "url/gurl.h"
 
 namespace web {
@@ -25,9 +24,6 @@
   // WebTest overrides.
   void SetUp() override;
   void TearDown() override;
-
-  // Adds a pending item to the NavigationManager associated with the WebState.
-  void AddPendingItem(const GURL& url, ui::PageTransition transition);
 
   // Loads the specified HTML content with URL into the WebState.
   void LoadHtml(NSString* html, const GURL& url);