PlzNavigate: stop navigations when opening a document for write

content/browser/frame_host/frame_tree_node.cc

Index: content/browser/frame_host/frame_tree_node.cc
diff --git a/content/browser/frame_host/frame_tree_node.cc b/content/browser/frame_host/frame_tree_node.cc
index be14c709c0a6ab7a14fa17d07840ed5fc735b758..023aad9c4fcf79999e2e533818637129a6838cd1 100644
--- a/content/browser/frame_host/frame_tree_node.cc
+++ b/content/browser/frame_host/frame_tree_node.cc
@@ -403,6 +403,8 @@ void FrameTreeNode::ResetNavigationRequest(bool keep_state) {
   if (!navigation_request_)
     return;
   bool was_renderer_initiated = !navigation_request_->browser_initiated();
+  int renderer_navigation_id =
+      navigation_request_->begin_params().renderer_navigation_id;
   NavigationRequest::AssociatedSiteInstanceType site_instance_type =
       navigation_request_->associated_site_instance_type();
   navigation_request_.reset();
@@ -425,8 +427,9 @@ void FrameTreeNode::ResetNavigationRequest(bool keep_state) {
   // If the navigation is renderer-initiated, the renderer should also be
   // informed that the navigation stopped.
   if (was_renderer_initiated) {
-    current_frame_host()->Send(
-        new FrameMsg_Stop(current_frame_host()->GetRoutingID()));
+    DCHECK(renderer_navigation_id != -1);
+    current_frame_host()->Send(new FrameMsg_DroppedNavigation(
+        current_frame_host()->GetRoutingID(), renderer_navigation_id));
   }
 
 }