Instrumentation to find jank in DomainReliabilityMonitor::AddBakedInConfigs

components/domain_reliability/config.cc

Index: components/domain_reliability/config.cc
diff --git a/components/domain_reliability/config.cc b/components/domain_reliability/config.cc
index 612f0bd596cbf5601a5a373740afeb44ee96faff..1c7d0941f06383a8b1dd7ebe868b70e981690698 100644
--- a/components/domain_reliability/config.cc
+++ b/components/domain_reliability/config.cc
@@ -13,6 +13,7 @@
 
 #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"
 
@@ -92,6 +93,10 @@ 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());