Add a SetDoNotFragment() method to DatagramSocket, and call this for

net/server/http_server_unittest.cc

 // Copyright 2013 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/server/http_server.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 528 matching lines @@
   int Write(IOBuffer* buf,
             int buf_len,
             const CompletionCallback& callback) override {
     return ERR_NOT_IMPLEMENTED;
   }
   int SetReceiveBufferSize(int32_t size) override {
     return ERR_NOT_IMPLEMENTED;
   }
   int SetSendBufferSize(int32_t size) override { return ERR_NOT_IMPLEMENTED; }
 
+  int SetDoNotFragment(bool do_not_fragment) override {
+    return ERR_NOT_IMPLEMENTED;
+  }
+
   void DidRead(const char* data, int data_len) {
     if (!read_buf_.get()) {
       pending_read_data_.append(data, data_len);
       return;
     }
     int read_len = std::min(data_len, read_buf_len_);
     memcpy(read_buf_->data(), data, read_len);
     pending_read_data_.assign(data + read_len, data_len - read_len);
     read_buf_ = NULL;
     read_buf_len_ = 0;
@@ skipping 94 matching lines @@
   ASSERT_THAT(client.ConnectAndWait(server_address_), IsOk());
   client.Send("GET / HTTP/1.1\r\n\r\n");
   ASSERT_FALSE(RunUntilRequestsReceived(1));
   ASSERT_EQ(1ul, connection_ids_.size());
   ASSERT_EQ(0ul, requests_.size());
 }
 
 }  // namespace
 
 }  // namespace net