Add quic_logging

net/quic/core/quic_connection.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/quic/core/quic_connection.h"
 
 #include <string.h>
 #include <sys/types.h>
 
 #include <algorithm>
 #include <iterator>
 #include <limits>
 #include <memory>
 #include <set>
 #include <utility>
 
 #include "base/format_macros.h"
-#include "base/logging.h"
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/stl_util.h"
 #include "net/base/address_family.h"
 #include "net/base/ip_address.h"
 #include "net/base/net_errors.h"
 #include "net/quic/core/crypto/crypto_protocol.h"
 #include "net/quic/core/crypto/quic_decrypter.h"
 #include "net/quic/core/crypto/quic_encrypter.h"
 #include "net/quic/core/proto/cached_network_parameters.pb.h"
 #include "net/quic/core/quic_bandwidth.h"
 #include "net/quic/core/quic_config.h"
 #include "net/quic/core/quic_flags.h"
 #include "net/quic/core/quic_packet_generator.h"
 #include "net/quic/core/quic_pending_retransmission.h"
 #include "net/quic/core/quic_sent_packet_manager.h"
 #include "net/quic/core/quic_utils.h"
 #include "net/quic/platform/api/quic_bug_tracker.h"
+#include "net/quic/platform/api/quic_logging.h"
 #include "net/quic/platform/api/quic_str_cat.h"
 #include "net/quic/platform/api/quic_text_utils.h"
 
 using base::StringPiece;
 using std::string;
 
 namespace net {
 
 class QuicDecrypter;
 class QuicEncrypter;
@@ skipping 217 matching lines @@
       can_truncate_connection_ids_(true),
       mtu_discovery_target_(0),
       mtu_probe_count_(0),
       packets_between_mtu_probes_(kPacketsBetweenMtuProbesBase),
       next_mtu_probe_at_(kPacketsBetweenMtuProbesBase),
       largest_received_packet_size_(0),
       goaway_sent_(false),
       goaway_received_(false),
       multipath_enabled_(false),
       write_error_occured_(false) {
-  DVLOG(1) << ENDPOINT
-           << "Created connection with connection_id: " << connection_id;
+  QUIC_DLOG(INFO) << ENDPOINT
+                  << "Created connection with connection_id: " << connection_id;
   framer_.set_visitor(this);
   if (!FLAGS_quic_reloadable_flag_quic_receive_packet_once_decrypted) {
     last_stop_waiting_frame_.least_unacked = 0;
   }
   stats_.connection_creation_time = clock_->ApproximateNow();
   if (FLAGS_quic_reloadable_flag_quic_enable_multipath) {
     sent_packet_manager_.reset(new QuicMultipathSentPacketManager(
         sent_packet_manager_.release(), this));
   }
   // TODO(ianswett): Supply the NetworkChangeVisitor as a constructor argument
@@ skipping 143 matching lines @@
 
 void QuicConnection::OnPublicResetPacket(const QuicPublicResetPacket& packet) {
   // Check that any public reset packet with a different connection ID that was
   // routed to this QuicConnection has been redirected before control reaches
   // here.  (Check for a bug regression.)
   DCHECK_EQ(connection_id_, packet.public_header.connection_id);
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnPublicResetPacket(packet);
   }
   const string error_details = "Received public reset.";
-  DVLOG(1) << ENDPOINT << error_details;
+  QUIC_DLOG(INFO) << ENDPOINT << error_details;
   TearDownLocalConnectionState(QUIC_PUBLIC_RESET, error_details,
                                ConnectionCloseSource::FROM_PEER);
 }
 
 bool QuicConnection::OnProtocolVersionMismatch(QuicVersion received_version) {
-  DVLOG(1) << ENDPOINT << "Received packet with mismatched version "
-           << received_version;
+  QUIC_DLOG(INFO) << ENDPOINT << "Received packet with mismatched version "
+                  << received_version;
   // TODO(satyamshekhar): Implement no server state in this mode.
   if (perspective_ == Perspective::IS_CLIENT) {
     const string error_details = "Protocol version mismatch.";
     QUIC_BUG << ENDPOINT << error_details;
     TearDownLocalConnectionState(QUIC_INTERNAL_ERROR, error_details,
                                  ConnectionCloseSource::FROM_SELF);
     return false;
   }
   DCHECK_NE(version(), received_version);
 
@@ skipping 24 matching lines @@
 
     default:
       DCHECK(false);
   }
 
   version_negotiation_state_ = NEGOTIATED_VERSION;
   visitor_->OnSuccessfulVersionNegotiation(received_version);
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnSuccessfulVersionNegotiation(received_version);
   }
-  DVLOG(1) << ENDPOINT << "version negotiated " << received_version;
+  QUIC_DLOG(INFO) << ENDPOINT << "version negotiated " << received_version;
 
   // Store the new version.
   framer_.set_version(received_version);
 
   // TODO(satyamshekhar): Store the packet number of this packet and close the
   // connection if we ever received a packet with incorrect version and whose
   // packet number is greater.
   return true;
 }
 
@@ skipping 17 matching lines @@
 
   if (version_negotiation_state_ != START_NEGOTIATION) {
     // Possibly a duplicate version negotiation packet.
     return;
   }
 
   if (base::ContainsValue(packet.versions, version())) {
     const string error_details =
         "Server already supports client's version and should have accepted the "
         "connection.";
-    DLOG(WARNING) << error_details;
+    QUIC_DLOG(WARNING) << error_details;
     TearDownLocalConnectionState(QUIC_INVALID_VERSION_NEGOTIATION_PACKET,
                                  error_details,
                                  ConnectionCloseSource::FROM_SELF);
     return;
   }
 
   if (!SelectMutualVersion(packet.versions)) {
     CloseConnection(
         QUIC_INVALID_VERSION,
         QuicStrCat("No common version found. Supported versions: {",
                    QuicVersionVectorToString(framer_.supported_versions()),
                    "}, peer supported versions: {",
                    QuicVersionVectorToString(packet.versions), "}"),
         ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
     return;
   }
 
-  DVLOG(1) << ENDPOINT
-           << "Negotiated version: " << QuicVersionToString(version());
+  QUIC_DLOG(INFO) << ENDPOINT
+                  << "Negotiated version: " << QuicVersionToString(version());
   server_supported_versions_ = packet.versions;
   version_negotiation_state_ = NEGOTIATION_IN_PROGRESS;
   RetransmitUnackedPackets(ALL_UNACKED_RETRANSMISSION);
 }
 
 bool QuicConnection::OnUnauthenticatedPublicHeader(
     const QuicPacketPublicHeader& header) {
   if (header.connection_id == connection_id_) {
     return true;
   }
 
   ++stats_.packets_dropped;
-  DVLOG(1) << ENDPOINT << "Ignoring packet from unexpected ConnectionId: "
-           << header.connection_id << " instead of " << connection_id_;
+  QUIC_DLOG(INFO) << ENDPOINT
+                  << "Ignoring packet from unexpected ConnectionId: "
+                  << header.connection_id << " instead of " << connection_id_;
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnIncorrectConnectionId(header.connection_id);
   }
   // If this is a server, the dispatcher routes each packet to the
   // QuicConnection responsible for the packet's connection ID.  So if control
   // arrives here and this is a server, the dispatcher must be malfunctioning.
   DCHECK_NE(Perspective::IS_SERVER, perspective_);
   return false;
 }
 
@@ skipping 14 matching lines @@
         "processed.";
     QUIC_BUG << error_details;
     CloseConnection(QUIC_INTERNAL_ERROR, error_details,
                     ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
     return false;
   }
 
   // If this packet has already been seen, or the sender has told us that it
   // will not be retransmitted, then stop processing the packet.
   if (!received_packet_manager_.IsAwaitingPacket(header.packet_number)) {
-    DVLOG(1) << ENDPOINT << "Packet " << header.packet_number
-             << " no longer being waited for.  Discarding.";
+    QUIC_DLOG(INFO) << ENDPOINT << "Packet " << header.packet_number
+                    << " no longer being waited for.  Discarding.";
     if (debug_visitor_ != nullptr) {
       debug_visitor_->OnDuplicatePacket(header.packet_number);
     }
     ++stats_.packets_dropped;
     return false;
   }
 
   return true;
 }
 
@@ skipping 27 matching lines @@
                                             last_packet_source_address_);
   // Do not migrate connection if the changed address packet is a reordered
   // packet.
   if (active_peer_migration_type_ == NO_CHANGE &&
       peer_migration_type != NO_CHANGE &&
       header.packet_number > received_packet_manager_.GetLargestObserved()) {
     StartPeerMigration(header.path_id, peer_migration_type);
   }
 
   --stats_.packets_dropped;
-  DVLOG(1) << ENDPOINT << "Received packet header: " << header;
+  QUIC_DVLOG(1) << ENDPOINT << "Received packet header: " << header;
   last_header_ = header;
   if (FLAGS_quic_reloadable_flag_quic_receive_packet_once_decrypted) {
     // An ack will be sent if a missing retransmittable packet was received;
     was_last_packet_missing_ =
         received_packet_manager_.IsMissing(last_header_.packet_number);
 
     // Record received to populate ack info correctly before processing stream
     // frames, since the processing may result in a response packet with a
     // bundled ack.
     received_packet_manager_.RecordPacketReceived(
@@ skipping 32 matching lines @@
   stats_.stream_bytes_received += frame.data_length;
   should_last_packet_instigate_acks_ = true;
   return connected_;
 }
 
 bool QuicConnection::OnAckFrame(const QuicAckFrame& incoming_ack) {
   DCHECK(connected_);
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnAckFrame(incoming_ack);
   }
-  DVLOG(1) << ENDPOINT << "OnAckFrame: " << incoming_ack;
+  QUIC_DVLOG(1) << ENDPOINT << "OnAckFrame: " << incoming_ack;
 
   if (last_header_.packet_number <= largest_seen_packet_with_ack_) {
-    DVLOG(1) << ENDPOINT << "Received an old ack frame: ignoring";
+    QUIC_DLOG(INFO) << ENDPOINT << "Received an old ack frame: ignoring";
     return true;
   }
 
   const char* error = ValidateAckFrame(incoming_ack);
   if (error != nullptr) {
     CloseConnection(QUIC_INVALID_ACK_DATA, error,
                     ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
     return false;
   }
 
@@ skipping 29 matching lines @@
 void QuicConnection::ProcessStopWaitingFrame(
     const QuicStopWaitingFrame& stop_waiting) {
   largest_seen_packet_with_stop_waiting_ = last_header_.packet_number;
   received_packet_manager_.UpdatePacketInformationSentByPeer(stop_waiting);
 }
 
 bool QuicConnection::OnStopWaitingFrame(const QuicStopWaitingFrame& frame) {
   DCHECK(connected_);
 
   if (last_header_.packet_number <= largest_seen_packet_with_stop_waiting_) {
-    DVLOG(1) << ENDPOINT << "Received an old stop waiting frame: ignoring";
+    QUIC_DLOG(INFO) << ENDPOINT
+                    << "Received an old stop waiting frame: ignoring";
     return true;
   }
 
   const char* error = ValidateStopWaitingFrame(frame);
   if (error != nullptr) {
     CloseConnection(QUIC_INVALID_STOP_WAITING_DATA, error,
                     ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
     return false;
   }
 
@@ skipping 21 matching lines @@
   DCHECK(connected_);
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnPingFrame(frame);
   }
   should_last_packet_instigate_acks_ = true;
   return true;
 }
 
 const char* QuicConnection::ValidateAckFrame(const QuicAckFrame& incoming_ack) {
   if (incoming_ack.largest_observed > packet_generator_.packet_number()) {
-    DLOG(WARNING) << ENDPOINT << "Peer's observed unsent packet:"
-                  << incoming_ack.largest_observed << " vs "
-                  << packet_generator_.packet_number();
+    QUIC_DLOG(WARNING) << ENDPOINT << "Peer's observed unsent packet:"
+                       << incoming_ack.largest_observed << " vs "
+                       << packet_generator_.packet_number();
     // We got an error for data we have not sent.  Error out.
     return "Largest observed too high.";
   }
 
   if (incoming_ack.largest_observed <
       sent_packet_manager_->GetLargestObserved(incoming_ack.path_id)) {
-    VLOG(1) << ENDPOINT << "Peer's largest_observed packet decreased:"
-            << incoming_ack.largest_observed << " vs "
-            << sent_packet_manager_->GetLargestObserved(incoming_ack.path_id)
-            << " packet_number:" << last_header_.packet_number
-            << " largest seen with ack:" << largest_seen_packet_with_ack_
-            << " connection_id: " << connection_id_;
+    QUIC_LOG(INFO) << ENDPOINT << "Peer's largest_observed packet decreased:"
+                   << incoming_ack.largest_observed << " vs "
+                   << sent_packet_manager_->GetLargestObserved(
+                          incoming_ack.path_id)
+                   << " packet_number:" << last_header_.packet_number
+                   << " largest seen with ack:" << largest_seen_packet_with_ack_
+                   << " connection_id: " << connection_id_;
     // A new ack has a diminished largest_observed value.  Error out.
     // If this was an old packet, we wouldn't even have checked.
     return "Largest observed too low.";
   }
 
   if (!incoming_ack.packets.Empty() &&
       incoming_ack.packets.Max() != incoming_ack.largest_observed) {
     QUIC_BUG << ENDPOINT
              << "Peer last received packet: " << incoming_ack.packets.Max()
              << " which is not equal to largest observed: "
              << incoming_ack.largest_observed;
     return "Last received packet not equal to largest observed.";
   }
 
   return nullptr;
 }
 
 const char* QuicConnection::ValidateStopWaitingFrame(
     const QuicStopWaitingFrame& stop_waiting) {
   if (stop_waiting.least_unacked <
       received_packet_manager_.peer_least_packet_awaiting_ack()) {
-    DLOG(ERROR) << ENDPOINT << "Peer's sent low least_unacked: "
-                << stop_waiting.least_unacked << " vs "
-                << received_packet_manager_.peer_least_packet_awaiting_ack();
+    QUIC_DLOG(ERROR)
+        << ENDPOINT
+        << "Peer's sent low least_unacked: " << stop_waiting.least_unacked
+        << " vs " << received_packet_manager_.peer_least_packet_awaiting_ack();
     // We never process old ack frames, so this number should only increase.
     return "Least unacked too small.";
   }
 
   if (stop_waiting.least_unacked > last_header_.packet_number) {
-    DLOG(ERROR) << ENDPOINT
-                << "Peer sent least_unacked:" << stop_waiting.least_unacked
-                << " greater than the enclosing packet number:"
-                << last_header_.packet_number;
+    QUIC_DLOG(ERROR) << ENDPOINT
+                     << "Peer sent least_unacked:" << stop_waiting.least_unacked
+                     << " greater than the enclosing packet number:"
+                     << last_header_.packet_number;
     return "Least unacked too large.";
   }
 
   return nullptr;
 }
 
 bool QuicConnection::OnRstStreamFrame(const QuicRstStreamFrame& frame) {
   DCHECK(connected_);
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnRstStreamFrame(frame);
   }
-  DVLOG(1) << ENDPOINT
-           << "RST_STREAM_FRAME received for stream: " << frame.stream_id
-           << " with error: "
-           << QuicRstStreamErrorCodeToString(frame.error_code);
+  QUIC_DLOG(INFO) << ENDPOINT
+                  << "RST_STREAM_FRAME received for stream: " << frame.stream_id
+                  << " with error: "
+                  << QuicRstStreamErrorCodeToString(frame.error_code);
   visitor_->OnRstStream(frame);
   visitor_->PostProcessAfterData();
   should_last_packet_instigate_acks_ = true;
   return connected_;
 }
 
 bool QuicConnection::OnConnectionCloseFrame(
     const QuicConnectionCloseFrame& frame) {
   DCHECK(connected_);
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnConnectionCloseFrame(frame);
   }
-  DVLOG(1) << ENDPOINT
-           << "Received ConnectionClose for connection: " << connection_id()
-           << ", with error: " << QuicErrorCodeToString(frame.error_code)
-           << " (" << frame.error_details << ")";
+  QUIC_DLOG(INFO) << ENDPOINT << "Received ConnectionClose for connection: "
+                  << connection_id()
+                  << ", with error: " << QuicErrorCodeToString(frame.error_code)
+                  << " (" << frame.error_details << ")";
   if (frame.error_code == QUIC_BAD_MULTIPATH_FLAG) {
-    LOG(ERROR) << "Unexpected QUIC_BAD_MULTIPATH_FLAG error."
-               << " last_received_header: " << last_header_
-               << " encryption_level: " << encryption_level_;
+    QUIC_LOG_FIRST_N(ERROR, 10) << "Unexpected QUIC_BAD_MULTIPATH_FLAG error."
+                                << " last_received_header: " << last_header_
+                                << " encryption_level: " << encryption_level_;
   }
   TearDownLocalConnectionState(frame.error_code, frame.error_details,
                                ConnectionCloseSource::FROM_PEER);
   return connected_;
 }
 
 bool QuicConnection::OnGoAwayFrame(const QuicGoAwayFrame& frame) {
   DCHECK(connected_);
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnGoAwayFrame(frame);
   }
-  DVLOG(1) << ENDPOINT << "GOAWAY_FRAME received with last good stream: "
-           << frame.last_good_stream_id
-           << " and error: " << QuicErrorCodeToString(frame.error_code)
-           << " and reason: " << frame.reason_phrase;
+  QUIC_DLOG(INFO) << ENDPOINT << "GOAWAY_FRAME received with last good stream: "
+                  << frame.last_good_stream_id
+                  << " and error: " << QuicErrorCodeToString(frame.error_code)
+                  << " and reason: " << frame.reason_phrase;
 
   goaway_received_ = true;
   visitor_->OnGoAway(frame);
   visitor_->PostProcessAfterData();
   should_last_packet_instigate_acks_ = true;
   return connected_;
 }
 
 bool QuicConnection::OnWindowUpdateFrame(const QuicWindowUpdateFrame& frame) {
   DCHECK(connected_);
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnWindowUpdateFrame(frame);
   }
-  DVLOG(1) << ENDPOINT
-           << "WINDOW_UPDATE_FRAME received for stream: " << frame.stream_id
-           << " with byte offset: " << frame.byte_offset;
+  QUIC_DLOG(INFO) << ENDPOINT << "WINDOW_UPDATE_FRAME received for stream: "
+                  << frame.stream_id
+                  << " with byte offset: " << frame.byte_offset;
   visitor_->OnWindowUpdateFrame(frame);
   visitor_->PostProcessAfterData();
   should_last_packet_instigate_acks_ = true;
   return connected_;
 }
 
 bool QuicConnection::OnBlockedFrame(const QuicBlockedFrame& frame) {
   DCHECK(connected_);
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnBlockedFrame(frame);
   }
-  DVLOG(1) << ENDPOINT
-           << "BLOCKED_FRAME received for stream: " << frame.stream_id;
+  QUIC_DLOG(INFO) << ENDPOINT
+                  << "BLOCKED_FRAME received for stream: " << frame.stream_id;
   visitor_->OnBlockedFrame(frame);
   visitor_->PostProcessAfterData();
   stats_.blocked_frames_received++;
   should_last_packet_instigate_acks_ = true;
   return connected_;
 }
 
 bool QuicConnection::OnPathCloseFrame(const QuicPathCloseFrame& frame) {
   DCHECK(connected_);
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnPathCloseFrame(frame);
   }
-  DVLOG(1) << ENDPOINT
-           << "PATH_CLOSE_FRAME received for path: " << frame.path_id;
+  QUIC_DLOG(INFO) << ENDPOINT
+                  << "PATH_CLOSE_FRAME received for path: " << frame.path_id;
   OnPathClosed(frame.path_id);
   return connected_;
 }
 
 void QuicConnection::OnPacketComplete() {
   // Don't do anything if this packet closed the connection.
   if (!connected_) {
     ClearLastFrames();
     return;
   }
 
-  DVLOG(1) << ENDPOINT << "Got packet " << last_header_.packet_number << " for "
-           << last_header_.public_header.connection_id;
+  QUIC_DVLOG(1) << ENDPOINT << "Got packet " << last_header_.packet_number
+                << " for " << last_header_.public_header.connection_id;
 
   if (FLAGS_quic_reloadable_flag_quic_receive_packet_once_decrypted) {
     // An ack will be sent if a missing retransmittable packet was received;
     const bool was_missing =
         should_last_packet_instigate_acks_ && was_last_packet_missing_;
 
     // It's possible the ack frame was sent along with response data, so it
     // no longer needs to be sent.
     if (ack_frame_updated()) {
       MaybeQueueAck(was_missing);
@@ skipping 122 matching lines @@
     WriteAndBundleAcksIfNotBlocked();
   }
 }
 
 void QuicConnection::SendVersionNegotiationPacket() {
   pending_version_negotiation_packet_ = true;
   if (writer_->IsWriteBlocked()) {
     visitor_->OnWriteBlocked();
     return;
   }
-  DVLOG(1) << ENDPOINT << "Sending version negotiation packet: {"
-           << QuicVersionVectorToString(framer_.supported_versions()) << "}";
+  QUIC_DLOG(INFO) << ENDPOINT << "Sending version negotiation packet: {"
+                  << QuicVersionVectorToString(framer_.supported_versions())
+                  << "}";
   std::unique_ptr<QuicEncryptedPacket> version_packet(
       packet_generator_.SerializeVersionNegotiationPacket(
           framer_.supported_versions()));
   WriteResult result = writer_->WritePacket(
       version_packet->data(), version_packet->length(), self_address().host(),
       peer_address(), per_packet_options_);
 
   if (result.status == WRITE_STATUS_ERROR) {
     OnWriteError(result.error_code);
     return;
@@ skipping 147 matching lines @@
   // Ensure the time coming from the packet reader is within a minute of now.
   if (FLAGS_quic_reloadable_flag_quic_allow_large_send_deltas &&
       std::abs((packet.receipt_time() - clock_->ApproximateNow()).ToSeconds()) >
           60) {
     QUIC_BUG << "Packet receipt time:"
              << packet.receipt_time().ToDebuggingValue()
              << " too far from current time:"
              << clock_->ApproximateNow().ToDebuggingValue();
   }
   time_of_last_received_packet_ = packet.receipt_time();
-  DVLOG(1) << ENDPOINT << "time of last received packet: "
-           << time_of_last_received_packet_.ToDebuggingValue();
+  QUIC_DVLOG(1) << ENDPOINT << "time of last received packet: "
+                << time_of_last_received_packet_.ToDebuggingValue();
 
   ScopedRetransmissionScheduler alarm_delayer(this);
   if (!framer_.ProcessPacket(packet)) {
     // If we are unable to decrypt this packet, it might be
     // because the CHLO or SHLO packet was lost.
     if (framer_.error() == QUIC_DECRYPTION_FAILURE) {
       if (encryption_level_ != ENCRYPTION_FORWARD_SECURE &&
           undecryptable_packets_.size() < max_undecryptable_packets_) {
         QueueUndecryptablePacket(packet);
       } else if (debug_visitor_ != nullptr) {
         debug_visitor_->OnUndecryptablePacket();
       }
     }
-    DVLOG(1) << ENDPOINT << "Unable to process packet.  Last packet processed: "
-             << last_header_.packet_number;
+    QUIC_DVLOG(1) << ENDPOINT
+                  << "Unable to process packet.  Last packet processed: "
+                  << last_header_.packet_number;
     current_packet_data_ = nullptr;
     return;
   }
 
   ++stats_.packets_processed;
   if (active_peer_migration_type_ != NO_CHANGE &&
       sent_packet_manager_->GetLargestObserved(last_header_.path_id) >
           highest_packet_sent_before_peer_migration_) {
     OnPeerMigrationValidated(last_header_.path_id);
   }
@@ skipping 57 matching lines @@
             last_packet_destination_address_.host().Normalized()) {
       CloseConnection(QUIC_ERROR_MIGRATING_ADDRESS,
                       "Self address migration is not supported at the server.",
                       ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
       return false;
     }
     self_address_ = last_packet_destination_address_;
   }
 
   if (!Near(header.packet_number, last_header_.packet_number)) {
-    DVLOG(1) << ENDPOINT << "Packet " << header.packet_number
-             << " out of bounds.  Discarding";
+    QUIC_DLOG(INFO) << ENDPOINT << "Packet " << header.packet_number
+                    << " out of bounds.  Discarding";
     CloseConnection(QUIC_INVALID_PACKET_HEADER, "packet number out of bounds.",
                     ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
     return false;
   }
 
   // Multipath is not enabled, but a packet with multipath flag on is
   // received.
   if (!multipath_enabled_ && header.public_header.multipath_flag) {
     const string error_details =
         "Received a packet with multipath flag but multipath is not enabled.";
     QUIC_BUG << error_details;
     CloseConnection(QUIC_BAD_MULTIPATH_FLAG, error_details,
                     ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
     return false;
   }
 
   if (version_negotiation_state_ != NEGOTIATED_VERSION) {
     if (perspective_ == Perspective::IS_SERVER) {
       if (!header.public_header.version_flag) {
         // Packets should have the version flag till version negotiation is
         // done.
         string error_details =
             QuicStrCat(ENDPOINT, "Packet ", header.packet_number,
                        " without version flag before version negotiated.");
-        DLOG(WARNING) << error_details;
+        QUIC_DLOG(WARNING) << error_details;
         CloseConnection(QUIC_INVALID_VERSION, error_details,
                         ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
         return false;
       } else {
         DCHECK_EQ(1u, header.public_header.versions.size());
         DCHECK_EQ(header.public_header.versions[0], version());
         version_negotiation_state_ = NEGOTIATED_VERSION;
         visitor_->OnSuccessfulVersionNegotiation(version());
         if (debug_visitor_ != nullptr) {
           debug_visitor_->OnSuccessfulVersionNegotiation(version());
@@ skipping 116 matching lines @@
   if (delay.IsInfinite()) {
     DCHECK_EQ(kInvalidPathId, path_id);
     send_alarm_->Cancel();
     return false;
   }
 
   DCHECK_NE(kInvalidPathId, path_id);
   // If the scheduler requires a delay, then we can not send this packet now.
   if (!delay.IsZero()) {
     send_alarm_->Update(now + delay, QuicTime::Delta::FromMilliseconds(1));
-    DVLOG(1) << ENDPOINT << "Delaying sending " << delay.ToMilliseconds()
-             << "ms";
+    QUIC_DVLOG(1) << ENDPOINT << "Delaying sending " << delay.ToMilliseconds()
+                  << "ms";
     return false;
   }
   return true;
 }
 
 bool QuicConnection::WritePacket(SerializedPacket* packet) {
   if (packet->packet_number <
       sent_packet_manager_->GetLargestSentPacket(packet->path_id)) {
     QUIC_BUG << "Attempt to write packet:" << packet->packet_number << " after:"
              << sent_packet_manager_->GetLargestSentPacket(packet->path_id);
@@ skipping 33 matching lines @@
     // This assures we won't try to write *forced* packets when blocked.
     // Return true to stop processing.
     if (writer_->IsWriteBlocked()) {
       visitor_->OnWriteBlocked();
       return true;
     }
   }
 
   DCHECK_LE(encrypted_length, kMaxPacketSize);
   DCHECK_LE(encrypted_length, packet_generator_.GetCurrentMaxPacketLength());
-  DVLOG(1) << ENDPOINT << "Sending packet " << packet_number << " : "
-           << (IsRetransmittable(*packet) == HAS_RETRANSMITTABLE_DATA
-                   ? "data bearing "
-                   : " ack only ")
-           << ", encryption level: "
-           << QuicUtils::EncryptionLevelToString(packet->encryption_level)
-           << ", encrypted length:" << encrypted_length;
-  DVLOG(2) << ENDPOINT << "packet(" << packet_number << "): " << std::endl
-           << QuicTextUtils::HexDump(
-                  StringPiece(packet->encrypted_buffer, encrypted_length));
+  QUIC_DVLOG(1) << ENDPOINT << "Sending packet " << packet_number << " : "
+                << (IsRetransmittable(*packet) == HAS_RETRANSMITTABLE_DATA
+                        ? "data bearing "
+                        : " ack only ")
+                << ", encryption level: "
+                << QuicUtils::EncryptionLevelToString(packet->encryption_level)
+                << ", encrypted length:" << encrypted_length;
+  QUIC_DVLOG(2) << ENDPOINT << "packet(" << packet_number << "): " << std::endl
+                << QuicTextUtils::HexDump(
+                       StringPiece(packet->encrypted_buffer, encrypted_length));
 
   // Measure the RTT from before the write begins to avoid underestimating the
   // min_rtt_, especially in cases where the thread blocks or gets swapped out
   // during the WritePacket below.
   QuicTime packet_send_time = clock_->Now();
   WriteResult result = writer_->WritePacket(
       packet->encrypted_buffer, encrypted_length, self_address().host(),
       peer_address(), per_packet_options_);
   if (result.error_code == ERR_IO_PENDING) {
     DCHECK_EQ(WRITE_STATUS_BLOCKED, result.status);
@@ skipping 17 matching lines @@
       packet->retransmittable_frames.empty() &&
       packet->encrypted_length > long_term_mtu_) {
     mtu_discovery_target_ = 0;
     mtu_discovery_alarm_->Cancel();
     // The write failed, but the writer is not blocked, so return true.
     return true;
   }
 
   if (result.status == WRITE_STATUS_ERROR) {
     OnWriteError(result.error_code);
-    DLOG(ERROR) << ENDPOINT << "failed writing " << encrypted_length
-                << " from host " << self_address().host().ToString()
-                << " to address " << peer_address().ToString()
-                << " with error code " << result.error_code;
+    QUIC_LOG_FIRST_N(ERROR, 10)
+        << ENDPOINT << "failed writing " << encrypted_length
+        << " bytes from host " << self_address().host().ToString()
+        << " to address " << peer_address().ToString() << " with error code "
+        << result.error_code;
     return false;
   }
 
   if (result.status != WRITE_STATUS_ERROR && debug_visitor_ != nullptr) {
     // Pass the write result to the visitor.
     debug_visitor_->OnPacketSent(*packet, packet->original_path_id,
                                  packet->original_packet_number,
                                  packet->transmission_type, packet_send_time);
   }
   if (packet->transmission_type == NOT_RETRANSMISSION) {
     time_of_last_sent_new_packet_ = packet_send_time;
   }
   // Only adjust the last sent time (for the purpose of tracking the idle
   // timeout) if this is the first retransmittable packet sent after a
   // packet is received. If it were updated on every sent packet, then
   // sending into a black hole might never timeout.
   if (IsRetransmittable(*packet) == HAS_RETRANSMITTABLE_DATA &&
       last_send_for_timeout_ <= time_of_last_received_packet_) {
     last_send_for_timeout_ = packet_send_time;
   }
   SetPingAlarm();
   MaybeSetMtuAlarm();
-  DVLOG(1) << ENDPOINT << "time we began writing last sent packet: "
-           << packet_send_time.ToDebuggingValue();
+  QUIC_DVLOG(1) << ENDPOINT << "time we began writing last sent packet: "
+                << packet_send_time.ToDebuggingValue();
 
   bool reset_retransmission_alarm = sent_packet_manager_->OnPacketSent(
       packet, packet->original_path_id, packet->original_packet_number,
       packet_send_time, packet->transmission_type, IsRetransmittable(*packet));
 
   if (reset_retransmission_alarm || !retransmission_alarm_->IsSet()) {
     SetRetransmissionAlarm();
   }
 
   // The packet number length must be updated after OnPacketSent, because it
   // may change the packet number length in packet.
   packet_generator_.UpdateSequenceNumberLength(
       sent_packet_manager_->GetLeastUnacked(packet->path_id),
       sent_packet_manager_->EstimateMaxPacketsInFlight(max_packet_length()));
 
   stats_.bytes_sent += result.bytes_written;
   ++stats_.packets_sent;
   if (packet->transmission_type != NOT_RETRANSMISSION) {
     stats_.bytes_retransmitted += result.bytes_written;
     ++stats_.packets_retransmitted;
   }
 
   return true;
 }
 
 bool QuicConnection::ShouldDiscardPacket(const SerializedPacket& packet) {
   if (!connected_) {
-    DVLOG(1) << ENDPOINT << "Not sending packet as connection is disconnected.";
+    QUIC_DLOG(INFO) << ENDPOINT
+                    << "Not sending packet as connection is disconnected.";
     return true;
   }
 
   QuicPacketNumber packet_number = packet.packet_number;
   if (encryption_level_ == ENCRYPTION_FORWARD_SECURE &&
       packet.encryption_level == ENCRYPTION_NONE) {
     // Drop packets that are NULL encrypted since the peer won't accept them
     // anymore.
-    DVLOG(1) << ENDPOINT << "Dropping NULL encrypted packet: " << packet_number
-             << " since the connection is forward secure.";
+    QUIC_DLOG(INFO) << ENDPOINT
+                    << "Dropping NULL encrypted packet: " << packet_number
+                    << " since the connection is forward secure.";
     return true;
   }
 
   return false;
 }
 
 void QuicConnection::OnWriteError(int error_code) {
   if (write_error_occured_) {
     // A write error already occurred. The connection is being closed.
     return;
   }
   write_error_occured_ = true;
 
   const string error_details = QuicStrCat(
       "Write failed with error: ", error_code, " (", strerror(error_code), ")");
-  DVLOG(1) << ENDPOINT << error_details;
+  QUIC_LOG_FIRST_N(ERROR, 2) << ENDPOINT << error_details;
   // We can't send an error as the socket is presumably borked.
   switch (error_code) {
     case kMessageTooBigErrorCode:
       CloseConnection(
           QUIC_PACKET_WRITE_ERROR, error_details,
           ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET_WITH_NO_ACK);
       break;
     default:
       // We can't send an error as the socket is presumably borked.
       TearDownLocalConnectionState(QUIC_PACKET_WRITE_ERROR, error_details,
@@ skipping 171 matching lines @@
 const QuicDecrypter* QuicConnection::decrypter() const {
   return framer_.decrypter();
 }
 
 const QuicDecrypter* QuicConnection::alternative_decrypter() const {
   return framer_.alternative_decrypter();
 }
 
 void QuicConnection::QueueUndecryptablePacket(
     const QuicEncryptedPacket& packet) {
-  DVLOG(1) << ENDPOINT << "Queueing undecryptable packet.";
+  QUIC_DVLOG(1) << ENDPOINT << "Queueing undecryptable packet.";
   undecryptable_packets_.push_back(packet.Clone());
 }
 
 void QuicConnection::MaybeProcessUndecryptablePackets() {
   if (undecryptable_packets_.empty() || encryption_level_ == ENCRYPTION_NONE) {
     return;
   }
 
   while (connected_ && !undecryptable_packets_.empty()) {
-    DVLOG(1) << ENDPOINT << "Attempting to process undecryptable packet";
+    QUIC_DVLOG(1) << ENDPOINT << "Attempting to process undecryptable packet";
     QuicEncryptedPacket* packet = undecryptable_packets_.front().get();
     if (!framer_.ProcessPacket(*packet) &&
         framer_.error() == QUIC_DECRYPTION_FAILURE) {
-      DVLOG(1) << ENDPOINT << "Unable to process undecryptable packet...";
+      QUIC_DVLOG(1) << ENDPOINT << "Unable to process undecryptable packet...";
       break;
     }
-    DVLOG(1) << ENDPOINT << "Processed undecryptable packet!";
+    QUIC_DVLOG(1) << ENDPOINT << "Processed undecryptable packet!";
     ++stats_.packets_processed;
     undecryptable_packets_.pop_front();
   }
 
   // Once forward secure encryption is in use, there will be no
   // new keys installed and hence any undecryptable packets will
   // never be able to be decrypted.
   if (encryption_level_ == ENCRYPTION_FORWARD_SECURE) {
     if (debug_visitor_ != nullptr) {
       // TODO(rtenneti): perhaps more efficient to pass the number of
       // undecryptable packets as the argument to OnUndecryptablePacket so that
       // we just need to call OnUndecryptablePacket once?
       for (size_t i = 0; i < undecryptable_packets_.size(); ++i) {
         debug_visitor_->OnUndecryptablePacket();
       }
     }
     undecryptable_packets_.clear();
   }
 }
 
 void QuicConnection::CloseConnection(
     QuicErrorCode error,
     const string& error_details,
     ConnectionCloseBehavior connection_close_behavior) {
   DCHECK(!error_details.empty());
   if (!connected_) {
-    DVLOG(1) << "Connection is already closed.";
+    QUIC_DLOG(INFO) << "Connection is already closed.";
     return;
   }
 
-  DVLOG(1) << ENDPOINT << "Closing connection: " << connection_id()
-           << ", with error: " << QuicErrorCodeToString(error) << " (" << error
-           << "), and details:  " << error_details;
+  QUIC_DLOG(INFO) << ENDPOINT << "Closing connection: " << connection_id()
+                  << ", with error: " << QuicErrorCodeToString(error) << " ("
+                  << error << "), and details:  " << error_details;
 
   if (connection_close_behavior ==
       ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET) {
     SendConnectionClosePacket(error, error_details, SEND_ACK);
   } else if (connection_close_behavior ==
              ConnectionCloseBehavior::
                  SEND_CONNECTION_CLOSE_PACKET_WITH_NO_ACK) {
     SendConnectionClosePacket(error, error_details, NO_ACK);
   }
 
   ConnectionCloseSource source = ConnectionCloseSource::FROM_SELF;
   if (perspective_ == Perspective::IS_CLIENT &&
       error == QUIC_CRYPTO_HANDSHAKE_STATELESS_REJECT) {
     // Regard stateless rejected connection as closed by server.
     source = ConnectionCloseSource::FROM_PEER;
   }
   TearDownLocalConnectionState(error, error_details, source);
 }
 
 void QuicConnection::SendConnectionClosePacket(QuicErrorCode error,
                                                const string& details,
                                                AckBundling ack_mode) {
-  DVLOG(1) << ENDPOINT << "Sending connection close packet.";
+  QUIC_DLOG(INFO) << ENDPOINT << "Sending connection close packet.";
   ClearQueuedPackets();
   ScopedPacketBundler ack_bundler(this, ack_mode);
   QuicConnectionCloseFrame* frame = new QuicConnectionCloseFrame();
   frame->error_code = error;
   frame->error_details = details;
   packet_generator_.AddControlFrame(QuicFrame(frame));
   packet_generator_.FlushAllQueuedFrames();
 }
 
 void QuicConnection::TearDownLocalConnectionState(
     QuicErrorCode error,
     const string& error_details,
     ConnectionCloseSource source) {
   if (!connected_) {
-    DVLOG(1) << "Connection is already closed.";
+    QUIC_DLOG(INFO) << "Connection is already closed.";
     return;
   }
   connected_ = false;
   DCHECK(visitor_ != nullptr);
   // TODO(rtenneti): crbug.com/546668. A temporary fix. Added a check for null
   // |visitor_| to fix crash bug. Delete |visitor_| check and histogram after
   // fix is merged.
   if (visitor_ != nullptr) {
     visitor_->OnConnectionClosed(error, error_details, source);
   } else {
     UMA_HISTOGRAM_BOOLEAN("Net.QuicCloseConnection.NullVisitor", true);
   }
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnConnectionClosed(error, error_details, source);
   }
   // Cancel the alarms so they don't trigger any action now that the
   // connection is closed.
   CancelAllAlarms();
 }
 
 void QuicConnection::CancelAllAlarms() {
-  DVLOG(1) << "Cancelling all QuicConnection alarms.";
+  QUIC_DVLOG(1) << "Cancelling all QuicConnection alarms.";
 
   ack_alarm_->Cancel();
   ping_alarm_->Cancel();
   resume_writes_alarm_->Cancel();
   retransmission_alarm_->Cancel();
   send_alarm_->Cancel();
   timeout_alarm_->Cancel();
   mtu_discovery_alarm_->Cancel();
 }
 
 void QuicConnection::SendGoAway(QuicErrorCode error,
                                 QuicStreamId last_good_stream_id,
                                 const string& reason) {
   if (goaway_sent_) {
     return;
   }
   goaway_sent_ = true;
 
-  DVLOG(1) << ENDPOINT << "Going away with error "
-           << QuicErrorCodeToString(error) << " (" << error << ")";
+  QUIC_DLOG(INFO) << ENDPOINT << "Going away with error "
+                  << QuicErrorCodeToString(error) << " (" << error << ")";
 
   // Opportunistically bundle an ack with this outgoing packet.
   ScopedPacketBundler ack_bundler(this, SEND_ACK_IF_PENDING);
   packet_generator_.AddControlFrame(
       QuicFrame(new QuicGoAwayFrame(error, last_good_stream_id, reason)));
 }
 
 QuicByteCount QuicConnection::max_packet_length() const {
   return packet_generator_.GetCurrentMaxPacketLength();
 }
@@ skipping 48 matching lines @@
 
 void QuicConnection::CheckForTimeout() {
   QuicTime now = clock_->ApproximateNow();
   QuicTime time_of_last_packet =
       std::max(time_of_last_received_packet_, last_send_for_timeout_);
 
   // |delta| can be < 0 as |now| is approximate time but |time_of_last_packet|
   // is accurate time. However, this should not change the behavior of
   // timeout handling.
   QuicTime::Delta idle_duration = now - time_of_last_packet;
-  DVLOG(1) << ENDPOINT << "last packet "
-           << time_of_last_packet.ToDebuggingValue()
-           << " now:" << now.ToDebuggingValue()
-           << " idle_duration:" << idle_duration.ToMicroseconds()
-           << " idle_network_timeout: "
-           << idle_network_timeout_.ToMicroseconds();
+  QUIC_DVLOG(1) << ENDPOINT << "last packet "
+                << time_of_last_packet.ToDebuggingValue()
+                << " now:" << now.ToDebuggingValue()
+                << " idle_duration:" << idle_duration.ToMicroseconds()
+                << " idle_network_timeout: "
+                << idle_network_timeout_.ToMicroseconds();
   if (idle_duration >= idle_network_timeout_) {
     const string error_details = "No recent network activity.";
-    DVLOG(1) << ENDPOINT << error_details;
+    QUIC_DVLOG(1) << ENDPOINT << error_details;
     CloseConnection(QUIC_NETWORK_IDLE_TIMEOUT, error_details,
                     idle_timeout_connection_close_behavior_);
     return;
   }
 
   if (!handshake_timeout_.IsInfinite()) {
     QuicTime::Delta connected_duration = now - stats_.connection_creation_time;
-    DVLOG(1) << ENDPOINT
-             << "connection time: " << connected_duration.ToMicroseconds()
-             << " handshake timeout: " << handshake_timeout_.ToMicroseconds();
+    QUIC_DVLOG(1) << ENDPOINT
+                  << "connection time: " << connected_duration.ToMicroseconds()
+                  << " handshake timeout: "
+                  << handshake_timeout_.ToMicroseconds();
     if (connected_duration >= handshake_timeout_) {
       const string error_details = "Handshake timeout expired.";
-      DVLOG(1) << ENDPOINT << error_details;
+      QUIC_DVLOG(1) << ENDPOINT << error_details;
       CloseConnection(QUIC_HANDSHAKE_TIMEOUT, error_details,
                       ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
       return;
     }
   }
 
   SetTimeoutAlarm();
 }
 
 void QuicConnection::SetTimeoutAlarm() {
@@ skipping 63 matching lines @@
     AckBundling ack_mode)
     : connection_(connection),
       already_in_batch_mode_(connection != nullptr &&
                              connection->packet_generator_.InBatchMode()) {
   if (connection_ == nullptr) {
     return;
   }
   // Move generator into batch mode. If caller wants us to include an ack,
   // check the delayed-ack timer to see if there's ack info to be sent.
   if (!already_in_batch_mode_) {
-    DVLOG(2) << "Entering Batch Mode.";
+    QUIC_DVLOG(2) << "Entering Batch Mode.";
     connection_->packet_generator_.StartBatchOperations();
   }
   if (ShouldSendAck(ack_mode)) {
-    DVLOG(1) << "Bundling ack with outgoing packet.";
+    QUIC_DVLOG(1) << "Bundling ack with outgoing packet.";
     DCHECK(ack_mode == SEND_ACK || connection_->ack_frame_updated() ||
            connection_->stop_waiting_count_ > 1);
     connection_->SendAck();
   }
 }
 
 bool QuicConnection::ScopedPacketBundler::ShouldSendAck(
     AckBundling ack_mode) const {
   switch (ack_mode) {
     case SEND_ACK:
@@ skipping 10 matching lines @@
       return true;
   }
 }
 
 QuicConnection::ScopedPacketBundler::~ScopedPacketBundler() {
   if (connection_ == nullptr) {
     return;
   }
   // If we changed the generator's batch state, restore original batch state.
   if (!already_in_batch_mode_) {
-    DVLOG(2) << "Leaving Batch Mode.";
+    QUIC_DVLOG(2) << "Leaving Batch Mode.";
     connection_->packet_generator_.FinishBatchOperations();
 
     // Once all transmissions are done, check if there is any outstanding data
     // to send and notify the congestion controller if not.
     //
     // Note that this means that the application limited check will happen as
     // soon as the last bundler gets destroyed, which is typically after a
     // single stream write is finished.  This means that if all the data from a
     // single write goes through the connection, the application-limited signal
     // will fire even if the caller does a write operation immediately after.
@@ skipping 102 matching lines @@
 
   // Calculate the packet number of the next probe *before* sending the current
   // one.  Otherwise, when SendMtuDiscoveryPacket() is called,
   // MaybeSetMtuAlarm() will not realize that the probe has been just sent, and
   // will reschedule this probe again.
   packets_between_mtu_probes_ *= 2;
   next_mtu_probe_at_ =
       packet_number_of_last_sent_packet_ + packets_between_mtu_probes_ + 1;
   ++mtu_probe_count_;
 
-  DVLOG(2) << "Sending a path MTU discovery packet #" << mtu_probe_count_;
+  QUIC_DVLOG(2) << "Sending a path MTU discovery packet #" << mtu_probe_count_;
   SendMtuDiscoveryPacket(mtu_discovery_target_);
 
   DCHECK(!mtu_discovery_alarm_->IsSet());
 }
 
 void QuicConnection::OnPeerMigrationValidated(QuicPathId path_id) {
   if (active_peer_migration_type_ == NO_CHANGE) {
     QUIC_BUG << "No migration underway.";
     return;
   }
   highest_packet_sent_before_peer_migration_ = 0;
   active_peer_migration_type_ = NO_CHANGE;
 }
 
 // TODO(jri): Modify method to start migration whenever a new IP address is seen
 // from a packet with sequence number > the one that triggered the previous
 // migration. This should happen even if a migration is underway, since the
 // most recent migration is the one that we should pay attention to.
 void QuicConnection::StartPeerMigration(
     QuicPathId path_id,
     PeerAddressChangeType peer_migration_type) {
   // TODO(fayang): Currently, all peer address change type are allowed. Need to
   // add a method ShouldAllowPeerAddressChange(PeerAddressChangeType type) to
   // determine whether |type| is allowed.
   if (active_peer_migration_type_ != NO_CHANGE ||
       peer_migration_type == NO_CHANGE) {
     QUIC_BUG << "Migration underway or no new migration started.";
     return;
   }
-  DVLOG(1) << ENDPOINT << "Peer's ip:port changed from "
-           << peer_address_.ToString() << " to "
-           << last_packet_source_address_.ToString()
-           << ", migrating connection.";
+  QUIC_DLOG(INFO) << ENDPOINT << "Peer's ip:port changed from "
+                  << peer_address_.ToString() << " to "
+                  << last_packet_source_address_.ToString()
+                  << ", migrating connection.";
 
   highest_packet_sent_before_peer_migration_ =
       packet_number_of_last_sent_packet_;
   peer_address_ = last_packet_source_address_;
   active_peer_migration_type_ = peer_migration_type;
 
   // TODO(jri): Move these calls to OnPeerMigrationValidated. Rename
   // OnConnectionMigration methods to OnPeerMigration.
   visitor_->OnConnectionMigration(peer_migration_type);
   sent_packet_manager_->OnConnectionMigration(path_id, peer_migration_type);
@@ skipping 60 matching lines @@
 
 void QuicConnection::CheckIfApplicationLimited() {
   if (queued_packets_.empty() &&
       !sent_packet_manager_->HasPendingRetransmissions() &&
       !visitor_->WillingAndAbleToWrite()) {
     sent_packet_manager_->OnApplicationLimited();
   }
 }
 
 }  // namespace net