PlzNavigate: stop navigations when opening a document for write

content/browser/frame_host/frame_tree_node.h

Index: content/browser/frame_host/frame_tree_node.h
diff --git a/content/browser/frame_host/frame_tree_node.h b/content/browser/frame_host/frame_tree_node.h
index f48f00c49e9b38424bce679210c51eb282b00086..5409f415b3f462626a63ba76b9d46fc9b3914c17 100644
--- a/content/browser/frame_host/frame_tree_node.h
+++ b/content/browser/frame_host/frame_tree_node.h
@@ -261,7 +261,10 @@ class CONTENT_EXPORT FrameTreeNode {
   // Resets the current navigation request. If |keep_state| is true, any state
   // created by the NavigationRequest (e.g. speculative RenderFrameHost,
   // loading state) will not be reset by the function.
-  void ResetNavigationRequest(bool keep_state);
+  // If |keep_state| is false and the request is renderer-initiated and
+  // |inform_renderer| is true, an IPC will be sent to the renderer process to
+  // inform it that the navigation it requested was cancelled.
+  void ResetNavigationRequest(bool keep_state, bool inform_renderer);
 
   // Returns true if this node is in a state where the loading progress is being
   // tracked.