Deprecate rolled out FLAGS_enable_quic_connection_flow_control_2.

net/quic/quic_dispatcher.cc

 // Copyright 2014 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/quic_dispatcher.h"
 
 #include <errno.h>
 
 #include "base/debug/stack_trace.h"
 #include "base/logging.h"
@@ skipping 146 matching lines @@
 QuicDispatcher::QuicDispatcher(const QuicConfig& config,
                                const QuicCryptoServerConfig& crypto_config,
                                const QuicVersionVector& supported_versions,
                                QuicConnectionHelperInterface* helper)
     : config_(config),
       crypto_config_(crypto_config),
       helper_(helper),
       delete_sessions_alarm_(
           helper_->CreateAlarm(new DeleteSessionsAlarm(this))),
       supported_versions_(supported_versions),
-      supported_versions_no_connection_flow_control_(supported_versions),
       current_packet_(NULL),
       framer_(supported_versions, /*unused*/ QuicTime::Zero(), true),
       framer_visitor_(new QuicFramerVisitor(this)) {
   framer_.set_visitor(framer_visitor_.get());
 }
 
 QuicDispatcher::~QuicDispatcher() {
   STLDeleteValues(&session_map_);
   STLDeleteElements(&closed_session_list_);
 }
 
 void QuicDispatcher::Initialize(QuicServerPacketWriter* writer) {
   DCHECK(writer_ == NULL);
   writer_.reset(writer);
   time_wait_list_manager_.reset(CreateQuicTimeWaitListManager());
-
-  // Remove all versions > QUIC_VERSION_18 from the
-  // supported_versions_no_connection_flow_control_ vector.
-  QuicVersionVector::iterator connection_it =
-      find(supported_versions_no_connection_flow_control_.begin(),
-           supported_versions_no_connection_flow_control_.end(),
-           QUIC_VERSION_19);
-  if (connection_it != supported_versions_no_connection_flow_control_.end()) {
-    supported_versions_no_connection_flow_control_.erase(
-        supported_versions_no_connection_flow_control_.begin(),
-        connection_it + 1);
-  }
-  CHECK(!supported_versions_no_connection_flow_control_.empty());
 }
 
 void QuicDispatcher::ProcessPacket(const IPEndPoint& server_address,
                                    const IPEndPoint& client_address,
                                    const QuicEncryptedPacket& packet) {
   current_server_address_ = server_address;
   current_client_address_ = client_address;
   current_packet_ = &packet;
   // ProcessPacket will cause the packet to be dispatched in
   // OnUnauthenticatedPublicHeader, or sent to the time wait list manager
@@ skipping 162 matching lines @@
   session->InitializeSession(crypto_config_);
   return session;
 }
 
 QuicConnection* QuicDispatcher::CreateQuicConnection(
     QuicConnectionId connection_id,
     const IPEndPoint& server_address,
     const IPEndPoint& client_address,
     QuicPerConnectionPacketWriter* writer) {
   QuicConnection* connection;
-  if (FLAGS_enable_quic_connection_flow_control_2) {
-    DVLOG(1) << "Creating QuicDispatcher with all versions.";
-    connection = new QuicConnection(connection_id,
-                                    client_address,
-                                    helper_,
-                                    writer,
-                                    false  /* owns_writer */,
-                                    true   /* is_server */,
-                                    supported_versions_);
-  } else {
-    DVLOG(1) << "Connection flow control disabled, creating QuicDispatcher "
-             << "WITHOUT version 19 or higher.";
-    connection = new QuicConnection(
-        connection_id,
-        client_address,
-        helper_,
-        writer,
-        false  /* owns_writer */,
-        true   /* is_server */,
-        supported_versions_no_connection_flow_control_);
-  }
+  connection = new QuicConnection(
+      connection_id,
+      client_address,
+      helper_,
+      writer,
+      false  /* owns_writer */,
+      true   /* is_server */,
+      supported_versions_);
   writer->set_connection(connection);
   return connection;
 }
 
 QuicTimeWaitListManager* QuicDispatcher::CreateQuicTimeWaitListManager() {
   return new QuicTimeWaitListManager(
       writer_.get(), this, helper_, supported_versions());
 }
 
 bool QuicDispatcher::HandlePacketForTimeWait(
     const QuicPacketPublicHeader& header) {
   if (header.reset_flag) {
     // Public reset packets do not have sequence numbers, so ignore the packet.
     return false;
   }
 
   // Switch the framer to the correct version, so that the sequence number can
   // be parsed correctly.
   framer_.set_version(time_wait_list_manager_->GetQuicVersionFromConnectionId(
       header.connection_id));
 
   // Continue parsing the packet to extract the sequence number.  Then
   // send it to the time wait manager in OnUnathenticatedHeader.
   return true;
 }
 
 }  // namespace net