Perform ClientHello padding if the field trial is enabled

net/socket/client_socket_pool_manager_impl.h

Index: net/socket/client_socket_pool_manager_impl.h
diff --git a/net/socket/client_socket_pool_manager_impl.h b/net/socket/client_socket_pool_manager_impl.h
index d6693333463f4f8e4a033ec1f8264c1007373486..a73d49a85e808164ac4e227740c7d413014553a9 100644
--- a/net/socket/client_socket_pool_manager_impl.h
+++ b/net/socket/client_socket_pool_manager_impl.h
@@ -31,6 +31,7 @@ class NetLog;
 class SOCKSClientSocketPool;
 class SSLClientSocketPool;
 class SSLConfigService;
+class SSLSocketConfigService;
 class TransportClientSocketPool;
 class TransportSecurityState;
 
@@ -66,7 +67,9 @@ class ClientSocketPoolManagerImpl : public base::NonThreadSafe,
                               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);
   ~ClientSocketPoolManagerImpl() override;
 
   void FlushSocketPoolsWithError(int error) override;
@@ -145,6 +148,8 @@ class ClientSocketPoolManagerImpl : public base::NonThreadSafe,
   ClientSocketPoolHistograms ssl_socket_pool_for_proxies_histograms_;
   SSLSocketPoolMap ssl_socket_pools_for_proxies_;
 
+  SSLSocketConfigService* const ssl_socket_config_service_;
+
   DISALLOW_COPY_AND_ASSIGN(ClientSocketPoolManagerImpl);
 };