Delivering the FIRST_NONEMPTY_PAINT phase changing event to base/

chrome/browser/metrics/chrome_metrics_service_client.cc

Index: chrome/browser/metrics/chrome_metrics_service_client.cc
diff --git a/chrome/browser/metrics/chrome_metrics_service_client.cc b/chrome/browser/metrics/chrome_metrics_service_client.cc
index 031a591ca8d9b3a143d4fd2c0c95066447043bbb..b3ee098aa419a3d1d1a79aa678b70165ff5f3564 100644
--- a/chrome/browser/metrics/chrome_metrics_service_client.cc
+++ b/chrome/browser/metrics/chrome_metrics_service_client.cc
@@ -133,6 +133,7 @@ ChromeMetricsServiceClient::ChromeMetricsServiceClient(
       google_update_metrics_provider_(nullptr),
 #endif
       drive_metrics_provider_(nullptr),
+      start_time_(base::TimeTicks::Now()),
       weak_ptr_factory_(this) {
   DCHECK(thread_checker_.CalledOnValidThread());
   RecordCommandLineMetrics();
@@ -423,19 +424,17 @@ void ChromeMetricsServiceClient::OnInitTaskGotGoogleUpdateData() {
       weak_ptr_factory_.GetWeakPtr());
 }
 
-// TODO(vadimt): Consider wrapping params in a struct after the list of params
-// to ReceivedProfilerData settles. crbug/456354.
 void ChromeMetricsServiceClient::ReceivedProfilerData(
     const tracked_objects::ProcessDataPhaseSnapshot& process_data_phase,
     base::ProcessId process_id,
     content::ProcessType process_type,
     int profiling_phase,
-    base::TimeDelta phase_start,
-    base::TimeDelta phase_finish,
+    base::TimeTicks phase_start,
+    base::TimeTicks phase_finish,
     const metrics::ProfilerEvents& past_events) {
   profiler_metrics_provider_->RecordProfilerData(
       process_data_phase, process_id, process_type, profiling_phase,
-      phase_start, phase_finish, past_events);
+      phase_start - start_time_, phase_finish - start_time_, past_events);
 }
 
 void ChromeMetricsServiceClient::FinishedReceivingProfilerData() {