Perform ClientHello padding if the field trial is enabled

net/socket/client_socket_pool_manager_impl.cc

Index: net/socket/client_socket_pool_manager_impl.cc
diff --git a/net/socket/client_socket_pool_manager_impl.cc b/net/socket/client_socket_pool_manager_impl.cc
index 6d0751b3f9bbb00dfa6506ba883ea2e1932b12ed..d436fe08423fd7526f39790b488e163432a6931c 100644
--- a/net/socket/client_socket_pool_manager_impl.cc
+++ b/net/socket/client_socket_pool_manager_impl.cc
@@ -46,7 +46,8 @@ ClientSocketPoolManagerImpl::ClientSocketPoolManagerImpl(
     const std::string& ssl_session_cache_shard,
     SSLConfigService* ssl_config_service,
     bool enable_ssl_connect_job_waiting,
-    HttpNetworkSession::SocketPoolType pool_type)
+    HttpNetworkSession::SocketPoolType pool_type,
+    SSLSocketConfigService* ssl_socket_config_service)
     : net_log_(net_log),
       socket_factory_(socket_factory),
       host_resolver_(host_resolver),
@@ -91,14 +92,16 @@ ClientSocketPoolManagerImpl::ClientSocketPoolManagerImpl(
                                                NULL /* no http proxy */,
                                                ssl_config_service,
                                                enable_ssl_connect_job_waiting,
-                                               net_log)),
+                                               net_log,
+                                               ssl_socket_config_service)),
       transport_for_socks_pool_histograms_("TCPforSOCKS"),
       socks_pool_histograms_("SOCK"),
       transport_for_http_proxy_pool_histograms_("TCPforHTTPProxy"),
       transport_for_https_proxy_pool_histograms_("TCPforHTTPSProxy"),
       ssl_for_https_proxy_pool_histograms_("SSLforHTTPSProxy"),
       http_proxy_pool_histograms_("HTTPProxy"),
-      ssl_socket_pool_for_proxies_histograms_("SSLForProxies") {
+      ssl_socket_pool_for_proxies_histograms_("SSLForProxies"),
+      ssl_socket_config_service_(ssl_socket_config_service) {
   CertDatabase::GetInstance()->AddObserver(this);
 }
 
@@ -304,7 +307,8 @@ ClientSocketPoolManagerImpl::GetSocketPoolForHTTPProxy(
                           tcp_https_ret.first->second /* https proxy */,
                           NULL /* no socks proxy */, NULL /* no http proxy */,
                           ssl_config_service_.get(),
-                          enable_ssl_connect_job_waiting_, net_log_)));
+                          enable_ssl_connect_job_waiting_, net_log_,
+                          ssl_socket_config_service_)));
   DCHECK(tcp_https_ret.second);
 
   std::pair<HTTPProxySocketPoolMap::iterator, bool> ret =
@@ -338,7 +342,7 @@ SSLClientSocketPool* ClientSocketPoolManagerImpl::GetSocketPoolForSSLWithProxy(
       NULL, /* no tcp pool, we always go through a proxy */
       GetSocketPoolForSOCKSProxy(proxy_server),
       GetSocketPoolForHTTPProxy(proxy_server), ssl_config_service_.get(),
-      enable_ssl_connect_job_waiting_, net_log_);
+      enable_ssl_connect_job_waiting_, net_log_, ssl_socket_config_service_);
 
   std::pair<SSLSocketPoolMap::iterator, bool> ret =
       ssl_socket_pools_for_proxies_.insert(std::make_pair(proxy_server,