Disabled shared crypto config code to isolate youtube performance issues

net/quic/quic_stream_factory.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/quic/quic_stream_factory.h"
 
 #include <set>
 
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 466 matching lines @@
 
   if (ContainsKey(all_crypto_configs_, host_port_proxy_pair)) {
     crypto_config = all_crypto_configs_[host_port_proxy_pair];
     DCHECK(crypto_config);
   } else {
     // TODO(rtenneti): if two quic_sessions for the same host_port_proxy_pair
     // share the same crypto_config, will it cause issues?
     crypto_config = new QuicCryptoClientConfig();
     crypto_config->SetDefaults();
     all_crypto_configs_[host_port_proxy_pair] = crypto_config;
-    PopulateFromCanonicalConfig(host_port_proxy_pair, crypto_config);
+    // TODO(rtenneti): Temporarily disabled using CanonicalConfig until we fix
+    // performance problems.
+    // PopulateFromCanonicalConfig(host_port_proxy_pair, crypto_config);
   }
   return crypto_config;
 }
 
 void QuicStreamFactory::PopulateFromCanonicalConfig(
     const HostPortProxyPair& host_port_proxy_pair,
     QuicCryptoClientConfig* crypto_config) {
   const string server_hostname = host_port_proxy_pair.first.host();
   const string kYouTubeSuffix(".c.youtube.com");
   if (!EndsWith(server_hostname, kYouTubeSuffix, false)) {
@@ skipping 17 matching lines @@
   DCHECK(canonical_crypto_config);
 
   // Copy the CachedState for the canonical server from canonical_crypto_config
   // as the initial CachedState for the server_hostname in crypto_config.
   crypto_config->InitializeFrom(server_hostname,
                                 canonical_host_port_proxy_pair.first.host(),
                                 canonical_crypto_config);
 }
 
 }  // namespace net