Add interfaces for most major Blimp net components.

blimp/net/blimp_connection.h

Index: blimp/net/blimp_connection.h
diff --git a/blimp/net/blimp_connection.h b/blimp/net/blimp_connection.h
index 5bd115d6fe71c46c8d203bc2ad9590184c6e953c..8e3cf50bd5a7ea5c7dad8928aced6c6f981d9529 100644
--- a/blimp/net/blimp_connection.h
+++ b/blimp/net/blimp_connection.h
@@ -11,17 +11,36 @@
 
 namespace blimp {
 
+class BlimpMessageProcessor;
 class PacketReader;
 class PacketWriter;
 
+

[Wez, 2015/11/12 03:45:56]

nit: Remove spurious blank line.

[Kevin M, 2015/11/12 19:03:47]

Done.

+// Encapsulates the state and logic used to exchange BlimpMessages over
+// a network connection.
 class BLIMP_NET_EXPORT BlimpConnection {
  public:
-  virtual ~BlimpConnection();
+  class DisconnectObserver {
+    // Called when the network connection for |this| is disconnected.
+    virtual void OnDisconnected() = 0;
+  };
 
- protected:
   BlimpConnection(scoped_ptr<PacketReader> reader,
                   scoped_ptr<PacketWriter> writer);
 
+  ~BlimpConnection();
+
+  // Lets |observer| know when the network connection is terminated.
+  void AddDisconnectObserver(DisconnectObserver* observer);
+
+  // Sets the processor which will take incoming messages for this connection.
+  // Can be set multiple times, but previously set processors are discarded.
+  void set_incoming_message_processor(
+      scoped_ptr<BlimpMessageProcessor> processor);
+
+  // Gets a processor for BrowserSession->BlimpConnection message routing.
+  scoped_ptr<BlimpMessageProcessor> take_outgoing_message_processor() const;
+
  private:
   scoped_ptr<PacketReader> reader_;
   scoped_ptr<PacketWriter> writer_;