Add a new GetNegotiatedProtocol method to StreamSocket and implement in all subclasses.

net/socket/ssl_server_socket_unittest.cc

 // Copyright (c) 2012 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.
 
 // This test suite uses SSLClientSocket to test the implementation of
 // SSLServerSocket. In order to establish connections between the sockets
 // we need two additional classes:
 // 1. FakeSocket
 //    Connects SSL socket to FakeDataChannel. This class is just a stub.
 //
@@ skipping 176 matching lines @@
   }
 
   virtual int64 NumBytesRead() const OVERRIDE {
     return -1;
   }
 
   virtual base::TimeDelta GetConnectTimeMicros() const OVERRIDE {
     return base::TimeDelta::FromMicroseconds(-1);
   }
 
+  virtual NextProto GetNegotiatedProtocol() const {
+    return kProtoUnknown;
+  }
+
  private:
   net::BoundNetLog net_log_;
   FakeDataChannel* incoming_;
   FakeDataChannel* outgoing_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeSocket);
 };
 
 }  // namespace
 
@@ skipping 261 matching lines @@
   unsigned char client_bad[kKeyingMaterialSize];
   rv = client_socket_->ExportKeyingMaterial(kKeyingLabelBad,
                                             false, kKeyingContext,
                                             client_bad, sizeof(client_bad));
   ASSERT_EQ(rv, net::OK);
   EXPECT_TRUE(memcmp(server_out, client_bad, sizeof(server_out)) != 0);
 }
 #endif
 
 }  // namespace net