time metric: record elapsed time from when the backgrounded and purged renderer is foregrounded unti

content/renderer/render_thread_impl.h

Index: content/renderer/render_thread_impl.h
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index 9a4affd3e7d5b02cb94bf02d5b66c63f8e265541..3924b34010864a3e7f5721702d1d27238ee2b65b 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -497,6 +497,10 @@ class CONTENT_EXPORT RenderThreadImpl
   };
   void GetRendererMemoryMetrics(RendererMemoryMetrics* memory_metrics) const;
 
+  bool NeedsToRecordFirstActivePaint() const {
+    return needs_to_record_first_active_paint_;
+  }
+
  protected:
   RenderThreadImpl(
       const InProcessChildThreadParams& params,
@@ -767,6 +771,7 @@ class CONTENT_EXPORT RenderThreadImpl
   base::CancelableClosure record_purge_suspend_metric_closure_;
   RendererMemoryMetrics purge_and_suspend_memory_metrics_;
   base::CancelableClosure record_purge_suspend_growth_metric_closure_;
+  bool needs_to_record_first_active_paint_;
 
   int32_t client_id_;