Perform ClientHello padding if the field trial is enabled

net/socket/ssl_client_socket.h

Index: net/socket/ssl_client_socket.h
diff --git a/net/socket/ssl_client_socket.h b/net/socket/ssl_client_socket.h
index 46461df2ead1fcc6f1424a7eebe533a5ffdc4768..0fbb3f43d8f51ea71e776f3b27e4a4dc8f4dd9f6 100644
--- a/net/socket/ssl_client_socket.h
+++ b/net/socket/ssl_client_socket.h
@@ -25,6 +25,7 @@ class ServerBoundCertService;
 class SSLCertRequestInfo;
 struct SSLConfig;
 class SSLInfo;
+class SSLSocketConfigService;
 class TransportSecurityState;
 class X509Certificate;
 
@@ -36,20 +37,23 @@ struct SSLClientSocketContext {
         channel_id_service(NULL),
         transport_security_state(NULL),
         cert_transparency_verifier(NULL),
-        cert_policy_enforcer(NULL) {}
+        cert_policy_enforcer(NULL),
+        ssl_socket_config_service(NULL) {}
 
   SSLClientSocketContext(CertVerifier* cert_verifier_arg,
                          ChannelIDService* channel_id_service_arg,
                          TransportSecurityState* transport_security_state_arg,
                          CTVerifier* cert_transparency_verifier_arg,
                          CertPolicyEnforcer* cert_policy_enforcer_arg,
-                         const std::string& ssl_session_cache_shard_arg)
+                         const std::string& ssl_session_cache_shard_arg,
+                         SSLSocketConfigService* ssl_socket_config_service_arg)
       : cert_verifier(cert_verifier_arg),
         channel_id_service(channel_id_service_arg),
         transport_security_state(transport_security_state_arg),
         cert_transparency_verifier(cert_transparency_verifier_arg),
         cert_policy_enforcer(cert_policy_enforcer_arg),
-        ssl_session_cache_shard(ssl_session_cache_shard_arg) {}
+        ssl_session_cache_shard(ssl_session_cache_shard_arg),
+        ssl_socket_config_service(ssl_socket_config_service_arg) {}
 
   CertVerifier* cert_verifier;
   ChannelIDService* channel_id_service;
@@ -60,6 +64,7 @@ struct SSLClientSocketContext {
   // SSL session cache. SSL sockets with the same ssl_session_cache_shard may
   // resume each other's SSL sessions but we'll never sessions between shards.
   const std::string ssl_session_cache_shard;
+  SSLSocketConfigService* ssl_socket_config_service;
 };
 
 // A client socket that uses SSL as the transport layer.