diff --git a/quic/core/crypto/aes_128_gcm_12_decrypter_test.cc b/quic/core/crypto/aes_128_gcm_12_decrypter_test.cc
index dd8a680..9ce4bda 100644
--- a/quic/core/crypto/aes_128_gcm_12_decrypter_test.cc
+++ b/quic/core/crypto/aes_128_gcm_12_decrypter_test.cc
@@ -269,7 +269,7 @@
                            // handle an AAD that is set to nullptr, as opposed
                            // to a zero-length, non-nullptr pointer.
                            aad.length() ? aad : QuicStringPiece(), ciphertext));
-      if (!decrypted.get()) {
+      if (!decrypted) {
         EXPECT_FALSE(has_pt);
         continue;
       }
diff --git a/quic/core/crypto/aes_128_gcm_decrypter_test.cc b/quic/core/crypto/aes_128_gcm_decrypter_test.cc
index 54793f8..579f76d 100644
--- a/quic/core/crypto/aes_128_gcm_decrypter_test.cc
+++ b/quic/core/crypto/aes_128_gcm_decrypter_test.cc
@@ -258,7 +258,7 @@
                            // handle an AAD that is set to nullptr, as opposed
                            // to a zero-length, non-nullptr pointer.
                            aad.length() ? aad : QuicStringPiece(), ciphertext));
-      if (!decrypted.get()) {
+      if (!decrypted) {
         EXPECT_FALSE(has_pt);
         continue;
       }
diff --git a/quic/core/crypto/aes_256_gcm_decrypter_test.cc b/quic/core/crypto/aes_256_gcm_decrypter_test.cc
index 73a3b3d..b3d61c7 100644
--- a/quic/core/crypto/aes_256_gcm_decrypter_test.cc
+++ b/quic/core/crypto/aes_256_gcm_decrypter_test.cc
@@ -262,7 +262,7 @@
                            // handle an AAD that is set to nullptr, as opposed
                            // to a zero-length, non-nullptr pointer.
                            aad.length() ? aad : QuicStringPiece(), ciphertext));
-      if (!decrypted.get()) {
+      if (!decrypted) {
         EXPECT_FALSE(has_pt);
         continue;
       }
diff --git a/quic/core/crypto/chacha20_poly1305_decrypter_test.cc b/quic/core/crypto/chacha20_poly1305_decrypter_test.cc
index a9c4999..930af24 100644
--- a/quic/core/crypto/chacha20_poly1305_decrypter_test.cc
+++ b/quic/core/crypto/chacha20_poly1305_decrypter_test.cc
@@ -159,7 +159,7 @@
         // is set to nullptr, as opposed to a zero-length, non-nullptr pointer.
         QuicStringPiece(aad.length() ? aad.data() : nullptr, aad.length()),
         ct));
-    if (!decrypted.get()) {
+    if (!decrypted) {
       EXPECT_FALSE(has_pt);
       continue;
     }
diff --git a/quic/core/crypto/chacha20_poly1305_tls_decrypter_test.cc b/quic/core/crypto/chacha20_poly1305_tls_decrypter_test.cc
index ce4dea9..90052d6 100644
--- a/quic/core/crypto/chacha20_poly1305_tls_decrypter_test.cc
+++ b/quic/core/crypto/chacha20_poly1305_tls_decrypter_test.cc
@@ -154,7 +154,7 @@
         // is set to nullptr, as opposed to a zero-length, non-nullptr pointer.
         QuicStringPiece(aad.length() ? aad.data() : nullptr, aad.length()),
         ct));
-    if (!decrypted.get()) {
+    if (!decrypted) {
       EXPECT_FALSE(has_pt);
       continue;
     }
diff --git a/quic/core/crypto/crypto_handshake_message.cc b/quic/core/crypto/crypto_handshake_message.cc
index 022a86b..762a279 100644
--- a/quic/core/crypto/crypto_handshake_message.cc
+++ b/quic/core/crypto/crypto_handshake_message.cc
@@ -57,7 +57,7 @@
 }
 
 const QuicData& CryptoHandshakeMessage::GetSerialized() const {
-  if (!serialized_.get()) {
+  if (!serialized_) {
     serialized_ = CryptoFramer::ConstructHandshakeMessage(*this);
   }
   return *serialized_;
diff --git a/quic/core/crypto/crypto_message_printer_bin.cc b/quic/core/crypto/crypto_message_printer_bin.cc
index ecbcab8..67cd531 100644
--- a/quic/core/crypto/crypto_message_printer_bin.cc
+++ b/quic/core/crypto/crypto_message_printer_bin.cc
@@ -14,7 +14,6 @@
 #include "net/third_party/quiche/src/quic/core/quic_utils.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_text_utils.h"
 
-using quic::Perspective;
 using std::cerr;
 using std::cout;
 using std::endl;
diff --git a/quic/core/crypto/quic_crypto_client_config.cc b/quic/core/crypto/quic_crypto_client_config.cc
index 75b2e6a..6813f7c 100644
--- a/quic/core/crypto/quic_crypto_client_config.cc
+++ b/quic/core/crypto/quic_crypto_client_config.cc
@@ -120,7 +120,7 @@
     return nullptr;
   }
 
-  if (!scfg_.get()) {
+  if (!scfg_) {
     scfg_ = CryptoFramer::ParseMessage(server_config_);
     DCHECK(scfg_.get());
   }
diff --git a/quic/core/crypto/quic_crypto_server_config.cc b/quic/core/crypto/quic_crypto_server_config.cc
index c211cdb..c23cf0f 100644
--- a/quic/core/crypto/quic_crypto_server_config.cc
+++ b/quic/core/crypto/quic_crypto_server_config.cc
@@ -385,14 +385,14 @@
   std::unique_ptr<CryptoHandshakeMessage> msg =
       CryptoFramer::ParseMessage(protobuf.config());
 
-  if (!msg.get()) {
+  if (!msg) {
     QUIC_LOG(WARNING) << "Failed to parse server config message";
     return nullptr;
   }
 
   QuicReferenceCountedPointer<Config> config =
       ParseConfigProtobuf(protobuf, /* is_fallback = */ false);
-  if (!config.get()) {
+  if (!config) {
     QUIC_LOG(WARNING) << "Failed to parse server config message";
     return nullptr;
   }
@@ -896,7 +896,7 @@
     }
     std::unique_ptr<CryptoHandshakeMessage> cetv(CryptoFramer::ParseMessage(
         QuicStringPiece(plaintext, plaintext_length)));
-    if (!cetv.get()) {
+    if (!cetv) {
       context->Fail(QUIC_INVALID_CRYPTO_MESSAGE_PARAMETER, "CETV parse error");
       return;
     }
diff --git a/quic/core/http/end_to_end_test.cc b/quic/core/http/end_to_end_test.cc
index cbb4ca8..e39b90a 100644
--- a/quic/core/http/end_to_end_test.cc
+++ b/quic/core/http/end_to_end_test.cc
@@ -66,7 +66,6 @@
 #include "net/third_party/quiche/src/quic/tools/quic_simple_server_stream.h"
 
 using spdy::kV3LowestPriority;
-using spdy::SETTINGS_MAX_HEADER_LIST_SIZE;
 using spdy::SpdyFramer;
 using spdy::SpdyHeaderBlock;
 using spdy::SpdySerializedFrame;
diff --git a/quic/core/http/quic_headers_stream_test.cc b/quic/core/http/quic_headers_stream_test.cc
index 83acfe7..2e6b729 100644
--- a/quic/core/http/quic_headers_stream_test.cc
+++ b/quic/core/http/quic_headers_stream_test.cc
@@ -36,7 +36,6 @@
 using spdy::SETTINGS_INITIAL_WINDOW_SIZE;
 using spdy::SETTINGS_MAX_CONCURRENT_STREAMS;
 using spdy::SETTINGS_MAX_FRAME_SIZE;
-using spdy::SETTINGS_MAX_HEADER_LIST_SIZE;
 using spdy::Spdy3PriorityToHttp2Weight;
 using spdy::SpdyAltSvcWireFormat;
 using spdy::SpdyDataIR;
diff --git a/quic/core/http/quic_receive_control_stream_test.cc b/quic/core/http/quic_receive_control_stream_test.cc
index c8df8a0..7374513 100644
--- a/quic/core/http/quic_receive_control_stream_test.cc
+++ b/quic/core/http/quic_receive_control_stream_test.cc
@@ -18,7 +18,6 @@
 
 namespace {
 using ::testing::_;
-using ::testing::AtLeast;
 using ::testing::StrictMock;
 
 struct TestParams {
diff --git a/quic/core/http/quic_spdy_session.cc b/quic/core/http/quic_spdy_session.cc
index 8b42a90..064f403 100644
--- a/quic/core/http/quic_spdy_session.cc
+++ b/quic/core/http/quic_spdy_session.cc
@@ -46,7 +46,6 @@
 using spdy::SpdyPushPromiseIR;
 using spdy::SpdySerializedFrame;
 using spdy::SpdySettingsId;
-using spdy::SpdySettingsIR;
 using spdy::SpdyStreamId;
 
 namespace quic {
diff --git a/quic/core/http/spdy_server_push_utils_test.cc b/quic/core/http/spdy_server_push_utils_test.cc
index 72d4a25..0f6ec8a 100644
--- a/quic/core/http/spdy_server_push_utils_test.cc
+++ b/quic/core/http/spdy_server_push_utils_test.cc
@@ -13,8 +13,6 @@
 #include "net/third_party/quiche/src/quic/platform/api/quic_text_utils.h"
 
 using spdy::SpdyHeaderBlock;
-using testing::Pair;
-using testing::UnorderedElementsAre;
 
 namespace quic {
 namespace test {
diff --git a/quic/core/qpack/qpack_instruction_encoder_test.cc b/quic/core/qpack/qpack_instruction_encoder_test.cc
index 0d172cd..abd1353 100644
--- a/quic/core/qpack/qpack_instruction_encoder_test.cc
+++ b/quic/core/qpack/qpack_instruction_encoder_test.cc
@@ -8,8 +8,6 @@
 #include "net/third_party/quiche/src/quic/platform/api/quic_test.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_text_utils.h"
 
-using ::testing::Values;
-
 namespace quic {
 namespace test {
 namespace {
diff --git a/quic/core/qpack/qpack_round_trip_test.cc b/quic/core/qpack/qpack_round_trip_test.cc
index 567676c..cb2c514 100644
--- a/quic/core/qpack/qpack_round_trip_test.cc
+++ b/quic/core/qpack/qpack_round_trip_test.cc
@@ -13,7 +13,6 @@
 #include "net/third_party/quiche/src/quic/platform/api/quic_test.h"
 #include "net/third_party/quiche/src/spdy/core/spdy_header_block.h"
 
-using ::testing::Combine;
 using ::testing::Values;
 
 namespace quic {
diff --git a/quic/core/quic_framer.cc b/quic/core/quic_framer.cc
index 2d4d4a5..b219042 100644
--- a/quic/core/quic_framer.cc
+++ b/quic/core/quic_framer.cc
@@ -1904,7 +1904,7 @@
 
   std::unique_ptr<CryptoHandshakeMessage> reset(
       CryptoFramer::ParseMessage(reader->ReadRemainingPayload()));
-  if (!reset.get()) {
+  if (!reset) {
     set_detailed_error("Unable to read reset message.");
     RecordDroppedPacketReason(DroppedPacketReason::INVALID_PUBLIC_RESET_PACKET);
     return RaiseError(QUIC_INVALID_PUBLIC_RST_PACKET);
diff --git a/quic/core/quic_stream_id_manager_test.cc b/quic/core/quic_stream_id_manager_test.cc
index 7b7fb1a..2ff55be 100644
--- a/quic/core/quic_stream_id_manager_test.cc
+++ b/quic/core/quic_stream_id_manager_test.cc
@@ -13,7 +13,6 @@
 #include "net/third_party/quiche/src/quic/test_tools/quic_stream_id_manager_peer.h"
 
 using testing::_;
-using testing::Invoke;
 using testing::StrictMock;
 
 namespace quic {
diff --git a/quic/qbone/platform/netlink_test.cc b/quic/qbone/platform/netlink_test.cc
index 7bd5f6b..04ce68c 100644
--- a/quic/qbone/platform/netlink_test.cc
+++ b/quic/qbone/platform/netlink_test.cc
@@ -45,7 +45,7 @@
     InSequence s;
 
     EXPECT_CALL(mock_kernel_, sendmsg(kSocketFd, _, _))
-        .WillOnce(Invoke([this, type, flags, send_callback](
+        .WillOnce(Invoke([type, flags, send_callback](
                              Unused, const struct msghdr* msg, int) {
           EXPECT_EQ(sizeof(struct sockaddr_nl), msg->msg_namelen);
           auto* nl_addr =
@@ -251,7 +251,7 @@
 
   ExpectNetlinkPacket(
       RTM_GETLINK, NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST,
-      [this, &hwaddr, &bcaddr](void* buf, size_t len, int seq) {
+      [&hwaddr, &bcaddr](void* buf, size_t len, int seq) {
         int ret = 0;
 
         struct nlmsghdr* netlink_message =
@@ -291,7 +291,7 @@
 
   ExpectNetlinkPacket(
       RTM_GETADDR, NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST,
-      [this, &addresses](void* buf, size_t len, int seq) {
+      [&addresses](void* buf, size_t len, int seq) {
         int ret = 0;
 
         struct nlmsghdr* nlm = nullptr;
diff --git a/quic/qbone/qbone_session_test.cc b/quic/qbone/qbone_session_test.cc
index dee951e..8a12cec 100644
--- a/quic/qbone/qbone_session_test.cc
+++ b/quic/qbone/qbone_session_test.cc
@@ -170,7 +170,7 @@
 class FakeTaskRunner {
  public:
   explicit FakeTaskRunner(MockQuicConnectionHelper* helper)
-      : tasks_([this](const TaskType& l, const TaskType& r) {
+      : tasks_([](const TaskType& l, const TaskType& r) {
           // Items at a later time should run after items at an earlier time.
           // Priority queue comparisons should return true if l appears after r.
           return l->time() > r->time();
diff --git a/quic/tools/quic_toy_client.cc b/quic/tools/quic_toy_client.cc
index a9a3886..4159735 100644
--- a/quic/tools/quic_toy_client.cc
+++ b/quic/tools/quic_toy_client.cc
@@ -63,7 +63,6 @@
 
 namespace {
 
-using quic::QuicSocketAddress;
 using quic::QuicStringPiece;
 using quic::QuicTextUtils;
 using quic::QuicUrl;