WIP shutdown handler for better stats dumping

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index c1ef49e8052b45758fcd1b30b42590a7c65886cd..b6508427bede9c0b5f574e28c2d21ef8a86623c6 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -908,7 +908,11 @@ void RenderThreadImpl::Shutdown() {
   // 1) a waste of performance and 2) a source of lots of complicated
   // crashes caused by shutdown ordering. Immediate exit eliminates
   // those problems.
-  //
+
+  // Give the V8 isolate a chance to dump internal stats useful for performance
+  // evaluation and debugging.
+  blink::mainThreadIsolate()->DumpAndResetStats();
+
   // In a single-process mode, we cannot call _exit(0) in Shutdown() because
   // it will exit the process before the browser side is ready to exit.
   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(