Fix comment about "happy eyeballs" IPv4 fallback

net/socket/transport_client_socket_pool.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/transport_client_socket_pool.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/compiler_specific.h"
@@ skipping 286 matching lines @@
   std::unique_ptr<SocketPerformanceWatcher> socket_performance_watcher;
   if (socket_performance_watcher_factory_) {
     socket_performance_watcher =
         socket_performance_watcher_factory_->CreateSocketPerformanceWatcher(
             SocketPerformanceWatcherFactory::PROTOCOL_TCP);
   }
   transport_socket_ = client_socket_factory_->CreateTransportClientSocket(
       addresses_, std::move(socket_performance_watcher), net_log().net_log(),
       net_log().source());
 
-  // If the list contains IPv6 and IPv4 addresses, the first address will
-  // be IPv6, and the IPv4 addresses will be tried as fallback addresses,
-  // per "Happy Eyeballs" (RFC 6555).
+  // If the list contains IPv6 and IPv4 addresses, and the first address
+  // is IPv6, the IPv4 addresses will be tried as fallback addresses, per
+  // "Happy Eyeballs" (RFC 6555).
   bool try_ipv6_connect_with_ipv4_fallback =
       addresses_.front().GetFamily() == ADDRESS_FAMILY_IPV6 &&
       !AddressListOnlyContainsIPv6(addresses_);
 
   // Enable TCP FastOpen if indicated by transport socket params.
   // Note: We currently do not turn on TCP FastOpen for destinations where
   // we try a TCP connect over IPv6 with fallback to IPv4.
   if (!try_ipv6_connect_with_ipv4_fallback &&
       params_->combine_connect_and_write() ==
           TransportSocketParams::COMBINE_CONNECT_AND_WRITE_DESIRED) {
@@ skipping 288 matching lines @@
     HigherLayeredPool* higher_pool) {
   base_.AddHigherLayeredPool(higher_pool);
 }
 
 void TransportClientSocketPool::RemoveHigherLayeredPool(
     HigherLayeredPool* higher_pool) {
   base_.RemoveHigherLayeredPool(higher_pool);
 }
 
 }  // namespace net