PlzNavigate: stop navigations when opening a document for write

content/browser/frame_host/navigator_impl.cc

Index: content/browser/frame_host/navigator_impl.cc
diff --git a/content/browser/frame_host/navigator_impl.cc b/content/browser/frame_host/navigator_impl.cc
index b2533a84e915e1e3650933c5f2ec1a26d4289824..bf4a5fb8cb4341ed7e716060efd66bab9965dbaa 100644
--- a/content/browser/frame_host/navigator_impl.cc
+++ b/content/browser/frame_host/navigator_impl.cc
@@ -1008,7 +1008,7 @@ void NavigatorImpl::OnBeginNavigation(
     RenderFrameHost* current_frame_host =
         frame_tree_node->render_manager()->current_frame_host();
     current_frame_host->Send(
-        new FrameMsg_Stop(current_frame_host->GetRoutingID()));
+        new FrameMsg_DroppedNavigation(current_frame_host->GetRoutingID()));
     return;
   }
 
@@ -1043,6 +1043,20 @@ void NavigatorImpl::OnBeginNavigation(
   navigation_request->BeginNavigation();
 }
 
+void NavigatorImpl::OnAbortNavigation(FrameTreeNode* frame_tree_node) {
+  DCHECK(frame_tree_node);
+
+  NavigationRequest* ongoing_navigation_request =
+      frame_tree_node->navigation_request();
+  if (!ongoing_navigation_request ||
+      ongoing_navigation_request->browser_initiated()) {
+    return;
+  }
+
+  // Abort the renderer-initiated navigation request.
+  CancelNavigation(frame_tree_node);
+}
+
 // PlzNavigate
 void NavigatorImpl::CancelNavigation(FrameTreeNode* frame_tree_node) {
   CHECK(IsBrowserSideNavigationEnabled());