Record renderer's memory growth 30min, 60min and 90min after purging separately.

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 46e27ce6204e9f36b676151b74e71ec688cdb022..37b88a04a61ad122219077cb4930d932824063b6 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -581,7 +581,9 @@ class CONTENT_EXPORT RenderThreadImpl
   void OnRendererHidden();
   void OnRendererVisible();
 
-  void RecordPurgeAndSuspendMemoryGrowthMetrics() const;
+  void RecordPurgeAndSuspendMemoryGrowthMetrics(
+      const char* suffix,
+      int foregrounded_count_when_purged);
 
   void ReleaseFreeMemory();
 
@@ -783,8 +785,8 @@ class CONTENT_EXPORT RenderThreadImpl
   mojom::RenderMessageFilterAssociatedPtr render_message_filter_;
 
   RendererMemoryMetrics purge_and_suspend_memory_metrics_;
-  base::CancelableClosure record_purge_suspend_growth_metric_closure_;
   bool needs_to_record_first_active_paint_;
+  int process_foregrounded_count_;
 
   int32_t client_id_;