Add memory and CPU histogram for OOPIF

content/browser/renderer_host/render_widget_host_view_base.h

Index: content/browser/renderer_host/render_widget_host_view_base.h
diff --git a/content/browser/renderer_host/render_widget_host_view_base.h b/content/browser/renderer_host/render_widget_host_view_base.h
index b7e0cda7766034cfe42ee7698329d66fe6aefed0..00dfc6387f74e21d06b79e2b85ed0e1410c48f14 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.h
+++ b/content/browser/renderer_host/render_widget_host_view_base.h
@@ -285,7 +285,7 @@ class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
   // other kinds of embeddable RWHVs are created, this should be renamed to
   // a more generic term -- in which case, static casts to RWHVChildFrame will
   // need to also be resolved.
-  virtual bool IsRenderWidgetHostViewChildFrame();
+  bool IsRenderWidgetHostViewChildFrame() override;
 
   // Returns true if the current view is in virtual reality mode.
   virtual bool IsInVR() const;