Update from https://crrev.com/306655

net/quic/crypto/source_address_token.cc

 // Copyright (c) 2013 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/crypto/source_address_token.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 
 using std::string;
 
 namespace net {
 
 SourceAddressToken::SourceAddressToken()
     : has_cached_network_parameters_(false) {
 }
 
 SourceAddressToken::~SourceAddressToken() {
 }
 
 string SourceAddressToken::SerializeAsString() const {
   string out;
-  out.push_back(ip_.size());
+  out.push_back(static_cast<char>(ip_.size()));
   out.append(ip_);
   string time_str = base::Int64ToString(timestamp_);
-  out.push_back(time_str.size());
+  out.push_back(static_cast<char>(time_str.size()));
   out.append(time_str);
   // TODO(rtenneti): Implement serialization of optional CachedNetworkParameters
   // when they are used.
   return out;
 }
 
 bool SourceAddressToken::ParseFromArray(const char* plaintext,
                                         size_t plaintext_length) {
   if (plaintext_length == 0) {
     return false;
@@ skipping 15 matching lines @@
 
   ip_.assign(&plaintext[1], ip_len);
   timestamp_ = timestamp;
 
   // TODO(rtenneti): Implement parsing of optional CachedNetworkParameters when
   // they are used.
   return true;
 }
 
 }  // namespace net