If the renderer drops a navigation, make sure the spinner doesn't spin endlessly.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index cfad1196e1904c640ff28fc875d8889788d4aee4..f82ebb2212d37a7d2cb4a50458331166a4e7f919 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -956,6 +956,7 @@ void RenderFrameImpl::OnNavigate(const FrameMsg_Navigate_Params& params) {
       params.common_params.url, params.common_params.navigation_type,
       params.commit_params.page_state, true, params.pending_history_list_offset,
       params.page_id, &is_reload, &cache_policy)) {
+    Send(new FrameHostMsg_DidDropNavigation(routing_id_));
     return;
   }