Adding instrumentation to locate the source of jankiness.

jingle/glue/proxy_resolving_client_socket.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 "jingle/glue/proxy_resolving_client_socket.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
+#include "base/profiler/scoped_tracker.h"
 #include "net/base/io_buffer.h"
 #include "net/base/load_flags.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_auth_controller.h"
 #include "net/http/http_network_session.h"
 #include "net/http/proxy_client_socket.h"
 #include "net/socket/client_socket_handle.h"
 #include "net/socket/client_socket_pool_manager.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
@@ skipping 185 matching lines @@
       ssl_config_, net::PRIVACY_MODE_DISABLED, bound_net_log_, transport_.get(),
       connect_callback_);
   if (status != net::ERR_IO_PENDING) {
     // Since this method is always called asynchronously. it is OK to call
     // ProcessConnectDone synchronously.
     ProcessConnectDone(status);
   }
 }
 
 void ProxyResolvingClientSocket::ProcessConnectDone(int status) {
+  // TODO(pkasting): Remove ScopedTracker below once crbug.com/455884 is fixed.
+  tracked_objects::ScopedTracker tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "455884 ProxyResolvingClientSocket::ProcessConnectDone"));
   if (status != net::OK) {
     // If the connection fails, try another proxy.
     status = ReconsiderProxyAfterError(status);
     // ReconsiderProxyAfterError either returns an error (in which case it is
     // not reconsidering a proxy) or returns ERR_IO_PENDING if it is considering
     // another proxy.
     DCHECK_NE(status, net::OK);
     if (status == net::ERR_IO_PENDING)
       // Proxy reconsideration pending. Return.
       return;
@@ skipping 195 matching lines @@
   return false;
 }
 
 void ProxyResolvingClientSocket::CloseTransportSocket() {
   if (transport_.get() && transport_->socket())
     transport_->socket()->Disconnect();
   transport_.reset();
 }
 
 }  // namespace jingle_glue