diff --git a/net/base/address_list.cc b/net/base/address_list.cc
index 94eea32bf5d621..428210645a11c0 100644
--- a/net/base/address_list.cc
+++ b/net/base/address_list.cc
@@ -79,7 +79,7 @@ base::Value AddressList::NetLogParams() const {
   base::Value list(base::Value::Type::LIST);
 
   for (const auto& ip_endpoint : *this)
-    list.GetList().emplace_back(ip_endpoint.ToString());
+    list.Append(ip_endpoint.ToString());
 
   dict.SetKey("address_list", std::move(list));
   dict.SetStringKey("canonical_name", canonical_name());
diff --git a/net/base/network_isolation_key.cc b/net/base/network_isolation_key.cc
index ea5e01a07d6ac8..0d88dbf9c6e619 100644
--- a/net/base/network_isolation_key.cc
+++ b/net/base/network_isolation_key.cc
@@ -86,12 +86,10 @@ bool NetworkIsolationKey::ToValue(base::Value* out_value) const {
   *out_value = base::Value(base::Value::Type::LIST);
   // Store origins GURLs, since GURL has validation logic that can be used when
   // loading, while Origin only has DCHECKs.
-  out_value->GetList().emplace_back(
-      base::Value(top_frame_origin_->GetURL().spec()));
+  out_value->Append(base::Value(top_frame_origin_->GetURL().spec()));
 
   if (use_frame_origin_)
-    out_value->GetList().emplace_back(
-        base::Value(frame_origin_->GetURL().spec()));
+    out_value->Append(base::Value(frame_origin_->GetURL().spec()));
   return true;
 }
 
diff --git a/net/cert/ct_signed_certificate_timestamp_log_param.cc b/net/cert/ct_signed_certificate_timestamp_log_param.cc
index e90fb45853bf10..b3f52dc0089476 100644
--- a/net/cert/ct_signed_certificate_timestamp_log_param.cc
+++ b/net/cert/ct_signed_certificate_timestamp_log_param.cc
@@ -63,7 +63,7 @@ base::Value SCTListToPrintableValues(
     const SignedCertificateTimestampAndStatusList& sct_and_status_list) {
   base::Value output_scts(base::Value::Type::LIST);
   for (const auto& sct_and_status : sct_and_status_list)
-    output_scts.GetList().push_back(
+    output_scts.Append(
         SCTToDictionary(*(sct_and_status.sct.get()), sct_and_status.status));
 
   return output_scts;
diff --git a/net/cert/x509_certificate_net_log_param.cc b/net/cert/x509_certificate_net_log_param.cc
index aaacd0a5fe0f06..f77cb42e31ff88 100644
--- a/net/cert/x509_certificate_net_log_param.cc
+++ b/net/cert/x509_certificate_net_log_param.cc
@@ -21,7 +21,7 @@ base::Value NetLogX509CertificateParams(const X509Certificate* certificate) {
   std::vector<std::string> encoded_chain;
   certificate->GetPEMEncodedChain(&encoded_chain);
   for (auto& pem : encoded_chain)
-    certs.GetList().emplace_back(std::move(pem));
+    certs.Append(std::move(pem));
   dict.SetKey("certificates", std::move(certs));
   return dict;
 }
diff --git a/net/dns/dns_config.cc b/net/dns/dns_config.cc
index 0a94c7312a33f6..fcae1e0800f30d 100644
--- a/net/dns/dns_config.cc
+++ b/net/dns/dns_config.cc
@@ -115,7 +115,7 @@ std::unique_ptr<base::Value> DnsConfig::ToValue() const {
     val.GetAsDictionary(&dict);
     dict->SetString("server_template", server.server_template);
     dict->SetBoolean("use_post", server.use_post);
-    list->GetList().push_back(std::move(val));
+    list->Append(std::move(val));
   }
   dict->Set("doh_servers", std::move(list));
   dict->SetInteger("secure_dns_mode", static_cast<int>(secure_dns_mode));
diff --git a/net/dns/host_cache.cc b/net/dns/host_cache.cc
index 69b2be5d52376a..33e54eccf94b3e 100644
--- a/net/dns/host_cache.cc
+++ b/net/dns/host_cache.cc
@@ -322,7 +322,7 @@ base::DictionaryValue HostCache::Entry::GetAsValue(
       // Append all of the resolved addresses.
       base::ListValue addresses_value;
       for (const IPEndPoint& address : addresses().value()) {
-        addresses_value.GetList().emplace_back(address.ToStringWithoutPort());
+        addresses_value.Append(address.ToStringWithoutPort());
       }
       entry_dict.SetKey(kAddressesKey, std::move(addresses_value));
     }
@@ -331,7 +331,7 @@ base::DictionaryValue HostCache::Entry::GetAsValue(
       // Append all resolved text records.
       base::ListValue text_list_value;
       for (const std::string& text_record : text_records().value()) {
-        text_list_value.GetList().emplace_back(text_record);
+        text_list_value.Append(text_record);
       }
       entry_dict.SetKey(kTextRecordsKey, std::move(text_list_value));
     }
@@ -341,8 +341,8 @@ base::DictionaryValue HostCache::Entry::GetAsValue(
       base::ListValue hostnames_value;
       base::ListValue host_ports_value;
       for (const HostPortPair& hostname : hostnames().value()) {
-        hostnames_value.GetList().emplace_back(hostname.host());
-        host_ports_value.GetList().emplace_back(hostname.port());
+        hostnames_value.Append(hostname.host());
+        host_ports_value.Append(hostname.port());
       }
       entry_dict.SetKey(kHostnameResultsKey, std::move(hostnames_value));
       entry_dict.SetKey(kHostPortsKey, std::move(host_ports_value));
diff --git a/net/ftp/ftp_ctrl_response_buffer.cc b/net/ftp/ftp_ctrl_response_buffer.cc
index b1bd27336a8418..ae31f46f47fbbe 100644
--- a/net/ftp/ftp_ctrl_response_buffer.cc
+++ b/net/ftp/ftp_ctrl_response_buffer.cc
@@ -85,7 +85,7 @@ namespace {
 base::Value NetLogFtpCtrlResponseParams(const FtpCtrlResponse* response) {
   base::ListValue lines;
   for (const auto& line : response->lines)
-    lines.GetList().push_back(NetLogStringValue(line));
+    lines.Append(NetLogStringValue(line));
 
   base::DictionaryValue dict;
   dict.SetInteger("status_code", response->status_code);
diff --git a/net/http/http_auth_gssapi_posix.cc b/net/http/http_auth_gssapi_posix.cc
index ad7ecad9ac2382..e12a7839888c24 100644
--- a/net/http/http_auth_gssapi_posix.cc
+++ b/net/http/http_auth_gssapi_posix.cc
@@ -168,7 +168,7 @@ base::Value GetGssStatusCodeValue(GSSAPILibrary* gssapi_lib,
     if (!base::IsStringUTF8(message_string))
       continue;
 
-    messages.GetList().emplace_back(message_string);
+    messages.Append(message_string);
   } while (message_context != 0 && ++iterations < kMaxDisplayIterations);
 
   if (messages.GetList().size() > 0)
diff --git a/net/http/http_request_headers.cc b/net/http/http_request_headers.cc
index b8db53837a443c..11af6fed583228 100644
--- a/net/http/http_request_headers.cc
+++ b/net/http/http_request_headers.cc
@@ -193,7 +193,7 @@ base::Value HttpRequestHeaders::NetLogParams(
   for (auto it = headers_.begin(); it != headers_.end(); ++it) {
     std::string log_value =
         ElideHeaderValueForNetLog(capture_mode, it->key, it->value);
-    headers->GetList().push_back(
+    headers->Append(
         NetLogStringValue(base::StrCat({it->key, ": ", log_value})));
   }
   dict.Set("headers", std::move(headers));
diff --git a/net/http/http_response_headers.cc b/net/http/http_response_headers.cc
index 087922755a2eee..a3d39a0f98dcec 100644
--- a/net/http/http_response_headers.cc
+++ b/net/http/http_response_headers.cc
@@ -1334,15 +1334,14 @@ base::Value HttpResponseHeaders::NetLogParams(
     NetLogCaptureMode capture_mode) const {
   base::DictionaryValue dict;
   base::ListValue headers;
-  headers.GetList().push_back(NetLogStringValue(GetStatusLine()));
+  headers.Append(NetLogStringValue(GetStatusLine()));
   size_t iterator = 0;
   std::string name;
   std::string value;
   while (EnumerateHeaderLines(&iterator, &name, &value)) {
     std::string log_value =
         ElideHeaderValueForNetLog(capture_mode, name, value);
-    headers.GetList().push_back(
-        NetLogStringValue(base::StrCat({name, ": ", log_value})));
+    headers.Append(NetLogStringValue(base::StrCat({name, ": ", log_value})));
   }
   dict.SetKey("headers", std::move(headers));
   return std::move(dict);
diff --git a/net/http/http_server_properties_manager.cc b/net/http/http_server_properties_manager.cc
index 48be29503e2e4e..12a28ac2e00e4b 100644
--- a/net/http/http_server_properties_manager.cc
+++ b/net/http/http_server_properties_manager.cc
@@ -724,7 +724,7 @@ void HttpServerPropertiesManager::WriteToPrefs(
     server_dict.SetStringKey(kServerKey, key.server.Serialize());
     server_dict.SetKey(kNetworkIsolationKey,
                        std::move(network_isolation_key_value));
-    servers_list.GetList().emplace_back(std::move(server_dict));
+    servers_list.Append(std::move(server_dict));
   }
   http_server_properties_dict.SetKey(kServersKey, std::move(servers_list));
 
@@ -861,7 +861,7 @@ void HttpServerPropertiesManager::SaveBrokenAlternativeServicesToPrefs(
       }
       entry_dict.SetKey(kBrokenCountKey, base::Value(broken_count));
       json_list_index_map[broken_alt_service] = json_list->GetList().size();
-      json_list->GetList().push_back(std::move(entry_dict));
+      json_list->Append(std::move(entry_dict));
     }
   }
 
@@ -898,7 +898,7 @@ void HttpServerPropertiesManager::SaveBrokenAlternativeServicesToPrefs(
         }
         entry_dict.SetKey(kBrokenUntilKey,
                           base::Value(base::NumberToString(expiration_int64)));
-        json_list->GetList().push_back(std::move(entry_dict));
+        json_list->Append(std::move(entry_dict));
       }
     }
   }
diff --git a/net/http/http_server_properties_manager_unittest.cc b/net/http/http_server_properties_manager_unittest.cc
index 061825f9505a7b..083faeeb9de924 100644
--- a/net/http/http_server_properties_manager_unittest.cc
+++ b/net/http/http_server_properties_manager_unittest.cc
@@ -1042,21 +1042,20 @@ TEST_F(HttpServerPropertiesManagerTest, BadSupportsQuic) {
     alternative_service_dict.SetStringKey("protocol_str", "quic");
     alternative_service_dict.SetIntKey("port", i);
     base::Value alternative_service_list(base::Value::Type::LIST);
-    alternative_service_list.GetList().emplace_back(
-        std::move(alternative_service_dict));
+    alternative_service_list.Append(std::move(alternative_service_dict));
     server_dict.SetKey("alternative_service",
                        std::move(alternative_service_list));
     server_dict.SetStringKey("server",
                              StringPrintf("https://www.google.com:%d", i));
     server_dict.SetKey("isolation", base::Value(base::Value::Type::LIST));
-    servers_list->GetList().emplace_back(std::move(server_dict));
+    servers_list->Append(std::move(server_dict));
   }
 
   // Set the server preference for http://mail.google.com server.
   base::Value server_dict2(base::Value::Type::DICTIONARY);
   server_dict2.SetStringKey("server", "https://mail.google.com");
   server_dict2.SetKey("isolation", base::Value(base::Value::Type::LIST));
-  servers_list->GetList().emplace_back(std::move(server_dict2));
+  servers_list->Append(std::move(server_dict2));
 
   base::DictionaryValue http_server_properties_dict = DictWithVersion();
   http_server_properties_dict.SetWithoutPathExpansion("servers",
diff --git a/net/network_error_logging/network_error_logging_service.cc b/net/network_error_logging/network_error_logging_service.cc
index 2f849ac056e994..edbc52b117117b 100644
--- a/net/network_error_logging/network_error_logging_service.cc
+++ b/net/network_error_logging/network_error_logging_service.cc
@@ -816,7 +816,7 @@ class NetworkErrorLoggingServiceImpl : public NetworkErrorLoggingService {
 
     base::Value cert_url_list = base::Value(base::Value::Type::LIST);
     if (details.cert_url.is_valid())
-      cert_url_list.GetList().push_back(base::Value(details.cert_url.spec()));
+      cert_url_list.Append(base::Value(details.cert_url.spec()));
     sxg_body->SetKey(kCertUrlKey, std::move(cert_url_list));
     body->SetDictionary(kSignedExchangeBodyKey, std::move(sxg_body));
 
diff --git a/net/proxy_resolution/dhcp_pac_file_fetcher_win.cc b/net/proxy_resolution/dhcp_pac_file_fetcher_win.cc
index bfa94fbc535315..b8ca8659b87eaf 100644
--- a/net/proxy_resolution/dhcp_pac_file_fetcher_win.cc
+++ b/net/proxy_resolution/dhcp_pac_file_fetcher_win.cc
@@ -223,7 +223,7 @@ base::Value NetLogGetAdaptersDoneParams(DhcpAdapterNamesLoggingInfo* info) {
     bool skipped = !IsDhcpCapableAdapter(adapter);
     adapter_value.SetKey("skipped", base::Value(skipped));
 
-    adapters_value.GetList().push_back(std::move(adapter_value));
+    adapters_value.Append(std::move(adapter_value));
   }
   result.SetKey("adapters", std::move(adapters_value));
 
diff --git a/net/proxy_resolution/proxy_config.cc b/net/proxy_resolution/proxy_config.cc
index 3b08998cd9e9aa..94ae3864b60200 100644
--- a/net/proxy_resolution/proxy_config.cc
+++ b/net/proxy_resolution/proxy_config.cc
@@ -250,7 +250,7 @@ base::Value ProxyConfig::ToValue() const {
       base::Value list(base::Value::Type::LIST);
 
       for (const auto& bypass_rule : bypass.rules())
-        list.GetList().emplace_back(bypass_rule->ToString());
+        list.Append(bypass_rule->ToString());
 
       dict.SetKey("bypass_list", std::move(list));
     }
diff --git a/net/proxy_resolution/proxy_list.cc b/net/proxy_resolution/proxy_list.cc
index eb7b7d8800a05e..609eb43c4c21ee 100644
--- a/net/proxy_resolution/proxy_list.cc
+++ b/net/proxy_resolution/proxy_list.cc
@@ -145,7 +145,7 @@ std::string ProxyList::ToPacString() const {
 base::Value ProxyList::ToValue() const {
   base::Value list(base::Value::Type::LIST);
   for (const auto& proxy : proxies_)
-    list.GetList().emplace_back(proxy.ToURI());
+    list.Append(proxy.ToURI());
   return list;
 }
 
diff --git a/net/proxy_resolution/proxy_resolution_service.cc b/net/proxy_resolution/proxy_resolution_service.cc
index bea9e508fcf565..3c92a4b6aabae4 100644
--- a/net/proxy_resolution/proxy_resolution_service.cc
+++ b/net/proxy_resolution/proxy_resolution_service.cc
@@ -331,7 +331,7 @@ base::Value NetLogBadProxyListParams(const ProxyRetryInfoMap* retry_info) {
   base::Value list(base::Value::Type::LIST);
 
   for (const auto& retry_info_pair : *retry_info)
-    list.GetList().emplace_back(retry_info_pair.first);
+    list.Append(retry_info_pair.first);
   dict.SetKey("bad_proxy_list", std::move(list));
   return dict;
 }
diff --git a/net/quic/quic_connection_logger.cc b/net/quic/quic_connection_logger.cc
index b83bbdea171035..34109ffedf8e96 100644
--- a/net/quic/quic_connection_logger.cc
+++ b/net/quic/quic_connection_logger.cc
@@ -121,7 +121,7 @@ base::Value NetLogQuicAckFrameParams(const quic::QuicAckFrame* frame) {
     for (quic::QuicPacketNumber packet = frame->packets.Min();
          packet < frame->largest_acked; ++packet) {
       if (!frame->packets.Contains(packet)) {
-        missing->GetList().push_back(NetLogNumberValue(packet.ToUint64()));
+        missing->Append(NetLogNumberValue(packet.ToUint64()));
       }
     }
   }
@@ -237,7 +237,7 @@ base::Value NetLogQuicCertificateVerifiedParams(
   base::DictionaryValue dict;
   auto subjects = std::make_unique<base::ListValue>();
   for (auto& dns_name : dns_names) {
-    subjects->GetList().emplace_back(std::move(dns_name));
+    subjects->Append(std::move(dns_name));
   }
   dict.Set("subjects", std::move(subjects));
   return std::move(dict);
diff --git a/net/quic/quic_stream_factory.cc b/net/quic/quic_stream_factory.cc
index 96ee77da5f1095..5962c610d8a82c 100644
--- a/net/quic/quic_stream_factory.cc
+++ b/net/quic/quic_stream_factory.cc
@@ -1613,7 +1613,7 @@ std::unique_ptr<base::Value> QuicStreamFactory::QuicStreamFactoryInfoToValue()
         hosts.insert(HostPortPair(alias_it->server_id().host(),
                                   alias_it->server_id().port()));
       }
-      list->GetList().push_back(session->GetInfoAsValue(hosts));
+      list->Append(session->GetInfoAsValue(hosts));
     }
   }
   return std::move(list);
diff --git a/net/socket/client_socket_pool_manager_impl.cc b/net/socket/client_socket_pool_manager_impl.cc
index fd85bfc0ee5c03..e76c198010f737 100644
--- a/net/socket/client_socket_pool_manager_impl.cc
+++ b/net/socket/client_socket_pool_manager_impl.cc
@@ -101,7 +101,7 @@ ClientSocketPoolManagerImpl::SocketPoolInfoToValue() const {
     } else {
       type = "http_proxy_socket_pool";
     }
-    list->GetList().push_back(
+    list->Append(
         socket_pool.second->GetInfoAsValue(socket_pool.first.ToURI(), type));
   }
 
diff --git a/net/spdy/spdy_log_util.cc b/net/spdy/spdy_log_util.cc
index fe85d2f016cc9a..833d0f469adb08 100644
--- a/net/spdy/spdy_log_util.cc
+++ b/net/spdy/spdy_log_util.cc
@@ -30,7 +30,7 @@ base::ListValue ElideSpdyHeaderBlockForNetLog(
   for (const auto& header : headers) {
     base::StringPiece key = header.first;
     base::StringPiece value = header.second;
-    headers_list.GetList().push_back(NetLogStringValue(
+    headers_list.Append(NetLogStringValue(
         base::StrCat({key, ": ",
                       ElideHeaderValueForNetLog(capture_mode, key.as_string(),
                                                 value.as_string())})));
diff --git a/net/spdy/spdy_session.cc b/net/spdy/spdy_session.cc
index af745dde692f88..fe3414cba9dab4 100644
--- a/net/spdy/spdy_session.cc
+++ b/net/spdy/spdy_session.cc
@@ -1427,7 +1427,7 @@ base::Value SpdySession::GetInfoAsValue() const {
   if (!pooled_aliases_.empty()) {
     base::Value alias_list(base::Value::Type::LIST);
     for (const auto& alias : pooled_aliases_) {
-      alias_list.GetList().emplace_back(alias.host_port_pair().ToString());
+      alias_list.Append(alias.host_port_pair().ToString());
     }
     dict.SetKey("aliases", std::move(alias_list));
   }
diff --git a/net/spdy/spdy_session_pool.cc b/net/spdy/spdy_session_pool.cc
index feeee871920a95..c742892f34f0fe 100644
--- a/net/spdy/spdy_session_pool.cc
+++ b/net/spdy/spdy_session_pool.cc
@@ -446,7 +446,7 @@ std::unique_ptr<base::Value> SpdySessionPool::SpdySessionPoolInfoToValue()
     const SpdySessionKey& key = it->first;
     const SpdySessionKey& session_key = it->second->spdy_session_key();
     if (key == session_key)
-      list->GetList().push_back(it->second->GetInfoAsValue());
+      list->Append(it->second->GetInfoAsValue());
   }
   return std::move(list);
 }
diff --git a/net/url_request/url_request.cc b/net/url_request/url_request.cc
index c31d4c30bd268c..4acd648a14ba1b 100644
--- a/net/url_request/url_request.cc
+++ b/net/url_request/url_request.cc
@@ -280,7 +280,7 @@ base::Value URLRequest::GetStateAsValue() const {
   if (url_chain_.size() > 1) {
     base::Value list(base::Value::Type::LIST);
     for (const GURL& url : url_chain_) {
-      list.GetList().emplace_back(url.possibly_invalid_spec());
+      list.Append(url.possibly_invalid_spec());
     }
     dict.SetKey("url_chain", std::move(list));
   }