Deciding best connection to schedule requests on based on cwnd and idle time

net/http/http_network_transaction.cc

 // Copyright (c) 2011 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/compiler_specific.h"
@@ skipping 922 matching lines @@
     // TODO(mbelshe): The keepalive property is really a property of
     //    the stream.  No need to compute it here just to pass back
     //    to the stream's Close function.
     if (stream_->CanFindEndOfResponse())
       keep_alive = GetResponseHeaders()->IsKeepAlive();
   }
 
   // Clean up connection if we are done.
   if (done) {
     LogTransactionMetrics();
+    stream_->LogNumRttVsBytesMetrics();
     stream_->Close(!keep_alive);
     // Note: we don't reset the stream here.  We've closed it, but we still
     // need it around so that callers can call methods such as
     // GetUploadProgress() and have them be meaningful.
     // TODO(mbelshe): This means we closed the stream here, and we close it
     // again in ~HttpNetworkTransaction.  Clean that up.
 
     // The next Read call will return 0 (EOF).
   }
 
@@ skipping 391 matching lines @@
       description = base::StringPrintf("Unknown state 0x%08X (%u)", state,
                                        state);
       break;
   }
   return description;
 }
 
 #undef STATE_CASE
 
 }  // namespace net