Removed CRWSessionEntry unittests.

ios/web/navigation/navigation_item_impl.h

Index: ios/web/navigation/navigation_item_impl.h
diff --git a/ios/web/navigation/navigation_item_impl.h b/ios/web/navigation/navigation_item_impl.h
index 7601f2dca72bda2573e52e15cae525848e527cb5..28a632f5c840f83cd79ae8ca16014c39fa5e0253 100644
--- a/ios/web/navigation/navigation_item_impl.h
+++ b/ios/web/navigation/navigation_item_impl.h
@@ -123,6 +123,11 @@ class NavigationItemImpl : public web::NavigationItem {
   // doesn't specify a title.
   static base::string16 GetDisplayTitleForURL(const GURL& url);
 
+#ifndef NDEBUG
+  // Returns a human-readable description of the state for debugging purposes.
+  NSString* GetDescription() const;
+#endif
+
  private:
   // The NavigationManItemStorageBuilder functions require access to
   // private variables of NavigationItemImpl.