Leak reports collect information about the last uptrend

components/metrics/leak_detector/leak_detector.cc

Index: components/metrics/leak_detector/leak_detector.cc
diff --git a/components/metrics/leak_detector/leak_detector.cc b/components/metrics/leak_detector/leak_detector.cc
index 5f33bab50fc7e9ffa661b08749068f8ec78f4014..6039e12a022adc413d212300116c3020913dfb8e 100644
--- a/components/metrics/leak_detector/leak_detector.cc
+++ b/components/metrics/leak_detector/leak_detector.cc
@@ -121,6 +121,9 @@ MemoryLeakReportProto ConvertLeakReportToProto(
     proto_entry->set_count_for_call_stack(entry.count_for_call_stack);
   }
 
+  proto.set_num_rising_intervals(report.num_rising_intervals());
+  proto.set_num_allocs_increase(report.num_allocs_increase());
+
   return proto;
 }
 
@@ -272,8 +275,14 @@ void LeakDetector::AllocHook(const void* ptr, size_t size) {
       detector->last_analysis_alloc_size_ =
           total_alloc_size - total_alloc_size % analysis_interval_bytes;
 
+      // Collect new leak reports. Use current |total_alloc_size| as
+      // a timestamp, then transform change in timestamp into the
+      // number of intervals passed.
       InternalVector<InternalLeakReport> leak_reports;
-      detector->impl_->TestForLeaks(&leak_reports);
+      detector->impl_->TestForLeaks(&leak_reports, total_alloc_size);
+      for (auto &report : leak_reports)
+        report.set_num_rising_intervals(
+            report.num_rising_intervals() / analysis_interval_bytes);
 
       // Pass leak reports to observers.
       std::vector<MemoryLeakReportProto> leak_report_protos;