[mojo-edk] Broadcast surprise port disruptions

mojo/edk/system/ports/node_delegate.h

 // Copyright 2016 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 MOJO_EDK_SYSTEM_PORTS_NODE_DELEGATE_H_
 #define MOJO_EDK_SYSTEM_PORTS_NODE_DELEGATE_H_
 
 #include <stddef.h>
 
 #include "mojo/edk/system/ports/message.h"
@@ skipping 14 matching lines @@
   // Allocate a message, including a header that can be used by the Node
   // implementation. |num_header_bytes| will be aligned. The newly allocated
   // memory need not be zero-filled.
   virtual void AllocMessage(size_t num_header_bytes,
                             ScopedMessage* message) = 0;
 
   // Forward a message asynchronously to the specified node. This method MUST
   // NOT synchronously call any methods on Node.
   virtual void ForwardMessage(const NodeName& node, ScopedMessage message) = 0;
 
+  // Broadcast a message to all nodes.
+  virtual void BroadcastMessage(ScopedMessage message) = 0;
+
   // Indicates that the port's status has changed recently. Use Node::GetStatus
   // to query the latest status of the port. Note, this event could be spurious
   // if another thread is simultaneously modifying the status of the port.
   virtual void PortStatusChanged(const PortRef& port_ref) = 0;
 };
 
 }  // namespace ports
 }  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_PORTS_NODE_DELEGATE_H_