Revert of PlzNavigate: send SourceLocation when mixed content is found

content/browser/frame_host/navigation_request.cc

Index: content/browser/frame_host/navigation_request.cc
diff --git a/content/browser/frame_host/navigation_request.cc b/content/browser/frame_host/navigation_request.cc
index a5a193160646054bdf9751aaf94b7c100b7092ed..bf639683ab26b51019d5ee4841f1f71cf22f0e53 100644
--- a/content/browser/frame_host/navigation_request.cc
+++ b/content/browser/frame_host/navigation_request.cc
@@ -425,11 +425,6 @@
     navigation_handle_->set_searchable_form_encoding(
         begin_params_.searchable_form_encoding);
   }
-
-  if (common_params_.source_location) {
-    navigation_handle_->set_source_location(
-        common_params_.source_location.value());
-  }
 }
 
 void NavigationRequest::TransferNavigationHandleOwnership(