Revert 250823 "With --site-per-process, avoid a crash when a sub..."

trunk/src/content/browser/frame_host/frame_tree_node.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/frame_host/frame_tree_node.h"
 
 #include <queue>
 
 #include "base/stl_util.h"
 #include "content/browser/frame_host/frame_tree.h"
@@ skipping 54 matching lines @@
     if ((*iter) == child)
       break;
   }
 
   if (iter != children_.end()) {
     (*iter)->set_parent(NULL);
     children_.erase(iter);
   }
 }
 
-void FrameTreeNode::ResetForNewProcess() {
+void FrameTreeNode::ResetForMainFrameSwap() {
   frame_id_ = kInvalidFrameId;
   current_url_ = GURL();
 
   // The children may not have been cleared if a cross-process navigation
   // commits before the old process cleans everything up.  Make sure the child
-  // nodes get deleted before swapping to a new process.
+  // nodes get deleted.
   children_.clear();
 }
 
 }  // namespace content