diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index cf45d73..a4ff0885 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -482,6 +482,18 @@
   // ChildMemoryCoordinatorDelegate implementation.
   void OnTrimMemoryImmediately() override;
 
+  struct RendererMemoryMetrics {
+    size_t partition_alloc_kb;
+    size_t blink_gc_kb;
+    size_t malloc_mb;
+    size_t discardable_kb;
+    size_t v8_main_thread_isolate_mb;
+    size_t total_allocated_mb;
+    size_t non_discardable_total_allocated_mb;
+    size_t total_allocated_per_render_view_mb;
+  };
+  void GetRendererMemoryMetrics(RendererMemoryMetrics* memory_metrics) const;
+
  protected:
   RenderThreadImpl(
       const InProcessChildThreadParams& params,