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 633966bae6ad15f523f3bf95b6f576560c3fccdf..788096a38e1f2588ebee38aa9f25d82d332df452 100644 |
--- a/content/browser/frame_host/frame_tree_node.h |
+++ b/content/browser/frame_host/frame_tree_node.h |
@@ -123,6 +123,10 @@ class CONTENT_EXPORT FrameTreeNode { |
bool IsDescendantOf(FrameTreeNode* other) const; |
+ // Return the node immediately preceding this node in its parent's |
+ // |children_|, or nullptr if there is no such node. |
+ FrameTreeNode* PreviousSibling() const; |
+ |
// Returns true if this node is in a loading state. |
bool IsLoading() const; |