Set up field trials for SSL read/write buffer sizes.

net/url_request/url_request_http_job.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/url_request/url_request_http_job.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
@@ skipping 1497 matching lines @@
   if (request_creation_time_.is_null()) {
     NOTREACHED()
         << "The same transaction shouldn't start twice without new timing.";
     return;
   }
 
   base::TimeDelta to_start = base::Time::Now() - request_creation_time_;
   request_creation_time_ = base::Time();
 
   UMA_HISTOGRAM_MEDIUM_TIMES("Net.HttpTimeToFirstByte", to_start);
+  if (request_info_.upload_data_stream &&
+      request_info_.upload_data_stream->size() > 1024 * 1024) {
+    UMA_HISTOGRAM_MEDIUM_TIMES("Net.HttpTimeToFirstByte.LargeUpload", to_start);
+  }
 }
 
 void URLRequestHttpJob::ResetTimer() {
   if (!request_creation_time_.is_null()) {
     NOTREACHED()
         << "The timer was reset before it was recorded.";
     return;
   }
   request_creation_time_ = base::Time::Now();
 }
@@ skipping 136 matching lines @@
   return override_response_headers_.get() ?
              override_response_headers_.get() :
              transaction_->GetResponseInfo()->headers.get();
 }
 
 void URLRequestHttpJob::NotifyURLRequestDestroyed() {
   awaiting_callback_ = false;
 }
 
 }  // namespace net