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

net/socket/ssl_client_socket_unittest.cc

Index: net/socket/ssl_client_socket_unittest.cc
diff --git a/net/socket/ssl_client_socket_unittest.cc b/net/socket/ssl_client_socket_unittest.cc
index 06a241e4c920aadac62af434aebdda63f965ab36..771415d024cfc0e83a8168bfb0e06f5ff7cbe0f7 100644
--- a/net/socket/ssl_client_socket_unittest.cc
+++ b/net/socket/ssl_client_socket_unittest.cc
@@ -144,6 +144,9 @@ class WrappedStreamSocket : public StreamSocket {
   int SetSendBufferSize(int32_t size) override {
     return transport_->SetSendBufferSize(size);
   }
+  int SetDoNotFragment(bool do_not_fragment) override {
+    return transport_->SetDoNotFragment(do_not_fragment);
+  }
 
  protected:
   std::unique_ptr<StreamSocket> transport_;