Move AcceptWithResponder() out of the MessageReceiver interface.

mojo/public/cpp/bindings/lib/interface_ptr_internal.h

 // Copyright 2014 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_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_PTR_INTERNAL_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_PTR_INTERNAL_H_
 
 #include <assert.h>
 #include <stdio.h>
 
@@ skipping 44 matching lines @@
   }
 
   void set_client(typename Interface::Client* client) {
     assert(proxy_);
     proxy_->stub.set_sink(client);
   }
 
  private:
   class ProxyWithStub : public Interface::Proxy_ {
    public:
-    explicit ProxyWithStub(MessageReceiver* receiver)
+    explicit ProxyWithStub(MessageReceiverWithResponder* receiver)
         : Interface::Proxy_(receiver) {
     }
     typename Interface::Client::Stub_ stub;
    private:
     MOJO_DISALLOW_COPY_AND_ASSIGN(ProxyWithStub);
   };
 
   ProxyWithStub* proxy_;
   Router* router_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(InterfacePtrState);
 };
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_PTR_INTERNAL_H_