Bootstrap Mojo IPC independent of Chrome IPC

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 e08dc4729fe1d233cf3dedad3327aaadbf72cb28..33c7ef5798693209caee6212b1623c58d0ea9553 100644
--- a/mojo/edk/system/node_channel.h
+++ b/mojo/edk/system/node_channel.h
@@ -87,6 +87,14 @@ class NodeChannel : public base::RefCountedThreadSafe<NodeChannel>,
   // Used for context in Delegate calls (via |from_node| arguments.)
   void SetRemoteNodeName(const ports::NodeName& name);
 
+  // If this is called with a non-empty |secret|, the channel expects the next
+  // message it receives to exactly match the contents of |secret|. This must be
+  // called before calling Start().
+  void SetExpectedSecret(const std::string& secret);
+
+  // Sends a secret to the remote end.
+  void SendSecret(const std::string& secret);
+
   void AcceptChild(const ports::NodeName& parent_name,
                    const ports::NodeName& token);
   void AcceptParent(const ports::NodeName& token,
@@ -135,6 +143,9 @@ class NodeChannel : public base::RefCountedThreadSafe<NodeChannel>,
   base::Lock channel_lock_;
   scoped_refptr<Channel> channel_;
 
+  // Must be set before calling Start(), if at all.
+  std::string expected_secret_;
+
   // Must only be accessed from |io_task_runner_|'s thread.
   ports::NodeName remote_node_name_;