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

blimp/net/test_common.h

 // Copyright 2015 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 BLIMP_NET_TEST_COMMON_H_
 #define BLIMP_NET_TEST_COMMON_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 93 matching lines @@
 
 class MockStreamSocket : public net::StreamSocket {
  public:
   MockStreamSocket();
   virtual ~MockStreamSocket();
 
   MOCK_METHOD3(Read, int(net::IOBuffer*, int, const net::CompletionCallback&));
   MOCK_METHOD3(Write, int(net::IOBuffer*, int, const net::CompletionCallback&));
   MOCK_METHOD1(SetReceiveBufferSize, int(int32_t));
   MOCK_METHOD1(SetSendBufferSize, int(int32_t));
+  MOCK_METHOD1(SetDoNotFragment, int(bool));
   MOCK_METHOD1(Connect, int(const net::CompletionCallback&));
   MOCK_METHOD0(Disconnect, void());
   MOCK_CONST_METHOD0(IsConnected, bool());
   MOCK_CONST_METHOD0(IsConnectedAndIdle, bool());
   MOCK_CONST_METHOD1(GetPeerAddress, int(net::IPEndPoint*));
   MOCK_CONST_METHOD1(GetLocalAddress, int(net::IPEndPoint*));
   MOCK_CONST_METHOD0(NetLog, const net::BoundNetLog&());
   MOCK_METHOD0(SetSubresourceSpeculation, void());
   MOCK_METHOD0(SetOmniboxSpeculation, void());
   MOCK_CONST_METHOD0(WasEverUsed, bool());
@@ skipping 88 matching lines @@
                       const net::CompletionCallback& callback) override;
 
   MOCK_METHOD2(MockableProcessMessage,
                void(const BlimpMessage& message,
                     const net::CompletionCallback& callback));
 };
 
 }  // namespace blimp
 
 #endif  // BLIMP_NET_TEST_COMMON_H_