Instrumenting IOComplete internals to find jank.

net/quic/quic_stream_factory.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/quic/quic_stream_factory.h"
 
 #include <set>
 
 #include "base/cpu.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 281 matching lines @@
 }
 
 void QuicStreamFactory::Job::OnIOComplete(int rv) {
   // TODO(vadimt): Remove ScopedTracker below once crbug.com/436634 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
           "436634 QuicStreamFactory::Job::OnIOComplete"));
 
   rv = DoLoop(rv);
 
+  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436634 is fixed.
+  tracked_objects::ScopedTracker tracking_profile1(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "436634 QuicStreamFactory::Job::OnIOComplete1"));

[mmenke, 2014/12/11 20:00:38]

This is done in the other CL, using a different name.

[vadimt, 2014/12/11 20:22:26]

Done.

+
   if (rv != ERR_IO_PENDING && !callback_.is_null()) {
     callback_.Run(rv);
   }
 }
 
 void QuicStreamFactory::Job::CancelWaitForDataReadyCallback() {
   // If we are waiting for WaitForDataReadyCallback, then cancel the callback.
   if (io_state_ != STATE_LOAD_SERVER_INFO_COMPLETE)
     return;
   server_info_->CancelWaitForDataReadyCallback();
@@ skipping 767 matching lines @@
   http_server_properties_->ClearAlternateProtocol(server);
   http_server_properties_->SetAlternateProtocol(
       server, alternate.port, alternate.protocol, 1);
   DCHECK_EQ(QUIC,
             http_server_properties_->GetAlternateProtocol(server).protocol);
   DCHECK(http_server_properties_->WasAlternateProtocolRecentlyBroken(
       server));
 }
 
 }  // namespace net