Instrumentation to find jank in DomainReliabilityMonitor::AddBakedInConfigs

components/domain_reliability/config.cc

 // Copyright 2014 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.
 
 // Make sure stdint.h includes SIZE_MAX. (See C89, p259, footnote 221.)
 #ifndef __STDC_LIMIT_MACROS
 #define __STDC_LIMIT_MACROS 1
 #endif
 
 #include "components/domain_reliability/config.h"
 
 #include <stdint.h>
 
 #include "base/json/json_reader.h"
 #include "base/json/json_value_converter.h"
+#include "base/profiler/scoped_tracker.h"
 #include "base/rand_util.h"
 #include "base/strings/string_util.h"
 
 namespace {
 
 bool ConvertURL(const base::StringPiece& string_piece, GURL* url) {
   *url = GURL(string_piece.as_string());
   return url->is_valid();
 }
 
@@ skipping 59 matching lines @@
 bool DomainReliabilityConfig::Collector::IsValid() const {
   return upload_url.is_valid();
 }
 
 DomainReliabilityConfig::DomainReliabilityConfig() : valid_until(0.0) {}
 DomainReliabilityConfig::~DomainReliabilityConfig() {}
 
 // static
 scoped_ptr<const DomainReliabilityConfig> DomainReliabilityConfig::FromJSON(
     const base::StringPiece& json) {
+  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436671 is fixed.
+  tracked_objects::ScopedTracker tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "436671 DomainReliabilityConfig::FromJSON"));
   scoped_ptr<base::Value> value(base::JSONReader::Read(json));
   base::JSONValueConverter<DomainReliabilityConfig> converter;
   scoped_ptr<DomainReliabilityConfig> config(new DomainReliabilityConfig());
 
   // If we can parse and convert the JSON into a valid config, return that.
   if (value && converter.Convert(*value, config.get()) && config->IsValid())
     return config.Pass();
   return scoped_ptr<const DomainReliabilityConfig>();
 }
 
@@ skipping 43 matching lines @@
                                  &DomainReliabilityConfig::valid_until);
   converter->RegisterStringField("monitored_domain",
                                  &DomainReliabilityConfig::domain);
   converter->RegisterRepeatedMessage("monitored_resources",
                                      &DomainReliabilityConfig::resources);
   converter->RegisterRepeatedMessage("collectors",
                                      &DomainReliabilityConfig::collectors);
 }
 
 }  // namespace domain_reliability