Point out in the comments the equivalence of two observer functions.

content/public/browser/web_contents_observer.h

Index: content/public/browser/web_contents_observer.h
diff --git a/content/public/browser/web_contents_observer.h b/content/public/browser/web_contents_observer.h
index 5a2c1f703032b2c3c5667addc82a799fd8bdc421..1c4d06c5920e7d5b6513e0ee3048598bd7e48910 100644
--- a/content/public/browser/web_contents_observer.h
+++ b/content/public/browser/web_contents_observer.h
@@ -72,9 +72,11 @@ class CONTENT_EXPORT WebContentsObserver : public IPC::Listener,
 
   // This method is invoked when the process for the current RenderView crashes.
   // The WebContents continues to use the RenderViewHost, e.g. when the user
-  // reloads the current page.
-  // When the RenderViewHost is deleted, the RenderViewDeleted method will be
-  // invoked.
+  // reloads the current page. When the RenderViewHost itself is deleted, the
+  // RenderViewDeleted method will be invoked.
+  //
+  // Note that this is equivalent to
+  // RenderProcessHostObserver::RenderProcessExited().
   virtual void RenderProcessGone(base::TerminationStatus status) {}
 
   // This method is invoked when a WebContents swaps its render view host with