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

net/socket/client_socket_pool_base_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.
 
 #include "net/socket/client_socket_pool_base.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 99 matching lines @@
   virtual bool WasEverUsed() const {
     return was_used_to_convey_data_ || num_bytes_read_ > 0;
   }
   virtual bool UsingTCPFastOpen() const { return false; }
   virtual int64 NumBytesRead() const { return num_bytes_read_; }
   virtual base::TimeDelta GetConnectTimeMicros() const {
     static const base::TimeDelta kDummyConnectTimeMicros =
         base::TimeDelta::FromMicroseconds(10);
     return kDummyConnectTimeMicros;  // Dummy value.
   }
+  virtual NextProto GetNegotiatedProtocol() const {
+    return kProtoUnknown;
+  }
 
  private:
   bool connected_;
   BoundNetLog net_log_;
   bool was_used_to_convey_data_;
   int num_bytes_read_;
 
   DISALLOW_COPY_AND_ASSIGN(MockClientSocket);
 };
 
@@ skipping 3446 matching lines @@
                             params_,
                             kDefaultPriority,
                             callback.callback(),
                             pool_.get(),
                             BoundNetLog()));
 }
 
 }  // namespace
 
 }  // namespace net