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

net/tools/quic/quic_dispatcher_test.cc

Index: net/tools/quic/quic_dispatcher_test.cc
diff --git a/net/tools/quic/quic_dispatcher_test.cc b/net/tools/quic/quic_dispatcher_test.cc
index bcbeb6a368a865a0198ae8583ddfe4864cb5e697..45cddb011fc75756792eb5a468cad264f1166d65 100644
--- a/net/tools/quic/quic_dispatcher_test.cc
+++ b/net/tools/quic/quic_dispatcher_test.cc
@@ -107,7 +107,7 @@ class QuicDispatcherTest : public ::testing::Test {
     dispatcher_.Initialize(1);
   }
 
-  virtual ~QuicDispatcherTest() {}
+  ~QuicDispatcherTest() override {}
 
   MockConnection* connection1() {
     return reinterpret_cast<MockConnection*>(session1_->connection());
@@ -264,14 +264,13 @@ class BlockingWriter : public QuicPacketWriterWrapper {
  public:
   BlockingWriter() : write_blocked_(false) {}
 
-  virtual bool IsWriteBlocked() const override { return write_blocked_; }
-  virtual void SetWritable() override { write_blocked_ = false; }
+  bool IsWriteBlocked() const override { return write_blocked_; }
+  void SetWritable() override { write_blocked_ = false; }
 
-  virtual WriteResult WritePacket(
-      const char* buffer,
-      size_t buf_len,
-      const IPAddressNumber& self_client_address,
-      const IPEndPoint& peer_client_address) override {
+  WriteResult WritePacket(const char* buffer,
+                          size_t buf_len,
+                          const IPAddressNumber& self_client_address,
+                          const IPEndPoint& peer_client_address) override {
     // It would be quite possible to actually implement this method here with
     // the fake blocked status, but it would be significantly more work in
     // Chromium, and since it's not called anyway, don't bother.
@@ -284,7 +283,7 @@ class BlockingWriter : public QuicPacketWriterWrapper {
 
 class QuicDispatcherWriteBlockedListTest : public QuicDispatcherTest {
  public:
-  virtual void SetUp() {
+  void SetUp() override {
     writer_ = new BlockingWriter;
     QuicDispatcherPeer::SetPacketWriterFactory(&dispatcher_,
                                                new TestWriterFactory());
@@ -305,7 +304,7 @@ class QuicDispatcherWriteBlockedListTest : public QuicDispatcherTest {
     blocked_list_ = QuicDispatcherPeer::GetWriteBlockedList(&dispatcher_);
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     EXPECT_CALL(*connection1(), SendConnectionClose(QUIC_PEER_GOING_AWAY));
     EXPECT_CALL(*connection2(), SendConnectionClose(QUIC_PEER_GOING_AWAY));
     dispatcher_.Shutdown();