With --site-per-process, avoid a crash when a subframe process goes away.

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 bd9790c83657c2e450a39c8caf3d42a09a2f3288..397343a2b5fa72aa72f0f63b91df99223f248d65 100644
--- a/content/browser/frame_host/frame_tree_node.h
+++ b/content/browser/frame_host/frame_tree_node.h
@@ -46,9 +46,8 @@ class CONTENT_EXPORT FrameTreeNode {
   void AddChild(scoped_ptr<FrameTreeNode> child, int frame_routing_id);
   void RemoveChild(FrameTreeNode* child);
 
-  // Clears process specific-state after a main frame process swap.
-  // TODO(creis): Look into how we can remove the need for this method.
-  void ResetForMainFrameSwap();
+  // Clears process specific-state in this node to prepare for a new process.
+  void ResetForNewProcess();
 
   FrameTree* frame_tree() const {
     return frame_tree_;