Fix SSLUITest.TestBadHTTPSDownload with PlzNavigate.

chrome/browser/favicon/content_favicon_driver_browsertest.cc

Index: chrome/browser/favicon/content_favicon_driver_browsertest.cc
diff --git a/chrome/browser/favicon/content_favicon_driver_browsertest.cc b/chrome/browser/favicon/content_favicon_driver_browsertest.cc
index 44bb338c1b45844e971fa0119f357539b45c879f..a8606266be15a83eb9f1f89eae4d50d763e13083 100644
--- a/chrome/browser/favicon/content_favicon_driver_browsertest.cc
+++ b/chrome/browser/favicon/content_favicon_driver_browsertest.cc
@@ -74,15 +74,6 @@ class TestResourceDispatcherHostDelegate
     }
   }
 
-  void DownloadStarting(
-      net::URLRequest* request,
-      content::ResourceContext* resource_context,
-      int child_id,
-      int route_id,
-      bool is_content_initiated,
-      bool must_download,
-      ScopedVector<content::ResourceThrottle>* throttles) override {}
-
  private:
   GURL url_;
   bool was_requested_;