Support mojo connections between unrelated peer processes.

mojo/edk/system/node_channel.h

Index: mojo/edk/system/node_channel.h
diff --git a/mojo/edk/system/node_channel.h b/mojo/edk/system/node_channel.h
index 5a5fc8a38dd725437b69a89f0300ba599440ceaf..bbac6422a0c856c46194d7724bbcdde539bb6dad 100644
--- a/mojo/edk/system/node_channel.h
+++ b/mojo/edk/system/node_channel.h
@@ -76,7 +76,10 @@ class NodeChannel : public base::RefCountedThreadSafe<NodeChannel>,
                                          const ports::NodeName& source_node,
                                          Channel::MessagePtr message) = 0;
 #endif
-
+    virtual void OnAcceptPeer(const ports::NodeName& from_node,
+                              const ports::NodeName& token,
+                              const ports::NodeName& peer_name,
+                              const ports::PortName& port_name) = 0;
     virtual void OnChannelError(const ports::NodeName& node,
                                 NodeChannel* channel) = 0;
 
@@ -124,6 +127,9 @@ class NodeChannel : public base::RefCountedThreadSafe<NodeChannel>,
                    const ports::NodeName& token);
   void AcceptParent(const ports::NodeName& token,
                     const ports::NodeName& child_name);
+  void AcceptPeer(const ports::NodeName& sender_name,
+                  const ports::NodeName& token,
+                  const ports::PortName& port_name);
   void AddBrokerClient(const ports::NodeName& client_name,
                        base::ProcessHandle process_handle);
   void BrokerClientAdded(const ports::NodeName& client_name,