Update from chromium https://crrev.com/301725/

net/socket/deterministic_socket_data_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/socket_test_util.h"
 
 #include <string.h>
 
 #include "base/memory/ref_counted.h"
 #include "testing/platform_test.h"
@@ skipping 11 matching lines @@
 static const int kLen3 = arraysize(kMsg3);
 
 }  // anonymous namespace
 
 namespace net {
 
 class DeterministicSocketDataTest : public PlatformTest {
  public:
   DeterministicSocketDataTest();
 
-  virtual void TearDown();
+  void TearDown() override;
 
   void ReentrantReadCallback(int len, int rv);
   void ReentrantWriteCallback(const char* data, int len, int rv);
 
  protected:
   void Initialize(MockRead* reads, size_t reads_count, MockWrite* writes,
                   size_t writes_count);
 
   void AssertSyncReadEquals(const char* data, int len);
   void AssertAsyncReadEquals(const char* data, int len);
@@ skipping 570 matching lines @@
   data_->StopAfter(1);
   AssertSyncWriteEquals(kMsg3, kLen3);
 
   data_->RunFor(1);
   ASSERT_TRUE(read_callback_.have_result());
   ASSERT_EQ(kLen2, read_callback_.WaitForResult());
   AssertReadBufferEquals(kMsg2, kLen2);
 }
 
 }  // namespace net