feat: accept-encoding zstd (#43150)

* fix: accept-encoding zstd

* Update shell/browser/net/system_network_context_manager.cc

Co-authored-by: Sam Maddock <smaddock@slack-corp.com>

* chore: make lint happy

---------

Co-authored-by: Sam Maddock <smaddock@slack-corp.com>

shell/browser/net/system_network_context_manager.cc

@@ -195,6 +195,8 @@ SystemNetworkContextManager::CreateDefaultNetworkContextParams() {
 void SystemNetworkContextManager::ConfigureDefaultNetworkContextParams(
     network::mojom::NetworkContextParams* network_context_params) {
   network_context_params->enable_brotli = true;
+  network_context_params->enable_zstd =
+      base::FeatureList::IsEnabled(net::features::kZstdContentEncoding);
 
   network_context_params->enable_referrers = true;