Move AcceptWithResponder() out of the MessageReceiver interface.

mojo/public/cpp/bindings/tests/sample_service_unittest.cc

 // 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.
 
 #include <algorithm>
 #include <ostream>
 #include <string>
 
 #include "mojo/public/cpp/bindings/allocation_scope.h"
 #include "mojo/public/cpp/environment/environment.h"
@@ skipping 269 matching lines @@
       int depth = 1;
       Print(depth, "foo", foo);
       Print(depth, "baz", baz);
       Print(depth, "port", port.get());
     }
   }
 };
 
 class ServiceProxyImpl : public ServiceProxy {
  public:
-  explicit ServiceProxyImpl(mojo::MessageReceiver* receiver)
+  explicit ServiceProxyImpl(mojo::MessageReceiverWithResponder* receiver)
       : ServiceProxy(receiver) {
   }
 };
 
-class SimpleMessageReceiver : public mojo::MessageReceiver {
+class SimpleMessageReceiver : public mojo::MessageReceiverWithResponder {
  public:
   virtual bool Accept(mojo::Message* message) MOJO_OVERRIDE {
     // Imagine some IPC happened here.
 
     if (g_dump_message_as_hex) {
       DumpHex(reinterpret_cast<const uint8_t*>(message->data()),
               message->data_num_bytes());
     }
 
     // In the receiving process, an implementation of ServiceStub is known to
@@ skipping 62 matching lines @@
   EXPECT_DOUBLE_EQ(1E10, full.a15());
   EXPECT_DOUBLE_EQ(-1.2E+20, full.a16());
   EXPECT_DOUBLE_EQ(1.23E-20, full.a17());
   EXPECT_TRUE(full.a18().is_null());
   EXPECT_TRUE(full.a19().is_null());
   EXPECT_TRUE(full.a20().is_null());
 }
 
 }  // namespace
 }  // namespace sample