Adding instrumentation to locate the source of jankiness.

chrome/browser/net/chrome_fraudulent_certificate_reporter.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 "chrome/browser/net/chrome_fraudulent_certificate_reporter.h"
 
 #include <set>
 
 #include "base/base64.h"
 #include "base/logging.h"
+#include "base/profiler/scoped_tracker.h"
 #include "base/stl_util.h"
 #include "base/time/time.h"
 #include "chrome/browser/net/cert_logger.pb.h"
 #include "net/base/elements_upload_data_stream.h"
 #include "net/base/load_flags.h"
 #include "net/base/request_priority.h"
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/cert/x509_certificate.h"
 #include "net/ssl/ssl_info.h"
 #include "net/url_request/url_request_context.h"
@@ skipping 82 matching lines @@
   DCHECK(i != inflight_requests_.end());
   scoped_ptr<net::URLRequest> url_request(*i);
   inflight_requests_.erase(i);
 }
 
 // TODO(palmer): Currently, the upload is fire-and-forget but soon we will
 // try to recover by retrying, and trying different endpoints, and
 // appealing to the user.
 void ChromeFraudulentCertificateReporter::OnResponseStarted(
     net::URLRequest* request) {
+  // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
+  tracked_objects::ScopedTracker tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422516 ChromeFraudulentCertificateReporter::OnResponseStarted"));
+
   const net::URLRequestStatus& status(request->status());
   if (!status.is_success()) {
     LOG(WARNING) << "Certificate upload failed"
                  << " status:" << status.status()
                  << " error:" << status.error();
   } else if (request->GetResponseCode() != 200) {
     LOG(WARNING) << "Certificate upload HTTP status: "
                  << request->GetResponseCode();
   }
   RequestComplete(request);
 }
 
 void ChromeFraudulentCertificateReporter::OnReadCompleted(
     net::URLRequest* request, int bytes_read) {}
 
 }  // namespace chrome_browser_net