PlzNavigate: stop navigations when opening a document for write

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 52404ecc9852bd4ff6b3fd1a6bf1af234b877311..bee34de98c77796c764103e60f9a6d25e58f8659 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -4121,6 +4121,10 @@ RenderFrameImpl::getEffectiveConnectionType() {
   return effective_connection_type_;
 }
 
+void RenderFrameImpl::abortClientNavigation() {
+  Send(new FrameHostMsg_AbortNavigation(routing_id_));
+}
+
 void RenderFrameImpl::didChangeSelection(bool is_empty_selection) {
   if (!GetRenderWidget()->input_handler().handling_input_event() &&
       !handling_select_range_)