Perform ClientHello padding if the field trial is enabled

net/http/http_network_transaction.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/http/http_network_transaction.h"
 
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 162 matching lines @@
     proxy_ssl_config_.rev_checking_enabled = false;
   }
 
   if (request_->load_flags & LOAD_PREFETCH)
     response_.unused_since_prefetch = true;
 
   // Channel ID is disabled if privacy mode is enabled for this request.
   if (request_->privacy_mode == PRIVACY_MODE_ENABLED)
     server_ssl_config_.channel_id_enabled = false;
 
+  if (session_->ssl_config_service()->SupportsFastradioPadding(
+          request_info->url)) {
+    server_ssl_config_.fastradio_padding_eligible = true;
+  }

[jeremyim, 2015/02/03 05:42:47]

It's possible to move the fastradio config setting to this location pretty
easily, and moves it up from the previous location in HttpStreamFactoryImpl::Job

+
   next_state_ = STATE_NOTIFY_BEFORE_CREATE_STREAM;
   int rv = DoLoop(OK);
   if (rv == ERR_IO_PENDING)
     callback_ = callback;
   return rv;
 }
 
 int HttpNetworkTransaction::RestartIgnoringLastError(
     const CompletionCallback& callback) {
   DCHECK(!stream_.get());
@@ skipping 1337 matching lines @@
       description = base::StringPrintf("Unknown state 0x%08X (%u)", state,
                                        state);
       break;
   }
   return description;
 }
 
 #undef STATE_CASE
 
 }  // namespace net