[DevTools] Display JS stack trace for DOM Node creation

Off by default, enabled via experiment.

Change-Id: I3c6503ce8c2d9102b4ccc3e71010e7d20c49a12e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1687474
Commit-Queue: Connor Clark <[email protected]>
Reviewed-by: Andrey Kosyakov <[email protected]>
Reviewed-by: Erik Luo <[email protected]>
Reviewed-by: Kentaro Hara <[email protected]>
Reviewed-by: Hayato Ito <[email protected]>
Reviewed-by: Joel Einbinder <[email protected]>
Cr-Original-Commit-Position: refs/heads/master@{#681542}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 16ad750d1405f61faf1daaff6fa33816c1a4e4d0
diff --git a/front_end/main/Main.js b/front_end/main/Main.js
index bde28ac..716f9fc 100644
--- a/front_end/main/Main.js
+++ b/front_end/main/Main.js
@@ -107,6 +107,7 @@
   _initializeExperiments() {
     // Keep this sorted alphabetically: both keys and values.
     Runtime.experiments.register('applyCustomStylesheet', 'Allow custom UI themes');
+    Runtime.experiments.register('captureNodeCreationStacks', 'Capture node creation stacks');
     Runtime.experiments.register('sourcesPrettyPrint', 'Automatically pretty print in the Sources Panel');
     Runtime.experiments.register('backgroundServices', 'Background web platform feature events', true);
     Runtime.experiments.register('backgroundServicesNotifications', 'Background services section for Notifications');