OOPIF: Remove the FrameTreeNode when a RemoteFrame is detached.

content/browser/frame_host/frame_tree_node.h

 // 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.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_FRAME_TREE_NODE_H_
 #define CONTENT_BROWSER_FRAME_HOST_FRAME_TREE_NODE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 94 matching lines @@
   }
 
   // Transfer any pending sandbox flags into |effective_sandbox_flags_|, and
   // return true if the sandbox flags were changed.
   bool CommitPendingSandboxFlags();
 
   bool HasSameOrigin(const FrameTreeNode& node) const {
     return replication_state_.origin.IsSameAs(node.replication_state_.origin);
   }
 
+  // Returns whether this node has any ancestor FrameTreeNode with a current
+  // RenderFrameHost in |site_instance|.  This is useful for determining if
+  // messages from the SiteInstance's process have "ownership" over this frame.
+  bool HasAncestorFrom(SiteInstance* site_instance) const;
+
   const FrameReplicationState& current_replication_state() const {
     return replication_state_;
   }
 
   RenderFrameHostImpl* current_frame_host() const {
     return render_manager_.current_frame_host();
   }
 
   bool IsDescendantOf(FrameTreeNode* other) const;
 
@@ skipping 52 matching lines @@
   // used.  |effective_sandbox_flags_| is updated with any pending sandbox
   // flags when a navigation for this frame commits.
   SandboxFlags effective_sandbox_flags_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameTreeNode);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_FRAME_TREE_NODE_H_