[Devtools] Add experiment for network group support

third_party/WebKit/Source/devtools/front_end/main/Main.js

Index: third_party/WebKit/Source/devtools/front_end/main/Main.js
diff --git a/third_party/WebKit/Source/devtools/front_end/main/Main.js b/third_party/WebKit/Source/devtools/front_end/main/Main.js
index f52322b0e9c46b5dc8d445111c5786b34790f95f..49158a90cc975132df965e7fcf30db93db8a1de1 100644
--- a/third_party/WebKit/Source/devtools/front_end/main/Main.js
+++ b/third_party/WebKit/Source/devtools/front_end/main/Main.js
@@ -102,6 +102,7 @@ Main.Main = class {
     Runtime.experiments.register('emptySourceMapAutoStepping', 'Empty sourcemap auto-stepping');
     Runtime.experiments.register('inputEventsOnTimelineOverview', 'Input events on Timeline overview', true);
     Runtime.experiments.register('liveSASS', 'Live SASS');
+    Runtime.experiments.register('networkGroupingRequests', 'Network request groups support', true);
     Runtime.experiments.register('nodeDebugging', 'Node debugging', true);
     Runtime.experiments.register('persistence2', 'Persistence 2.0');
     Runtime.experiments.register('persistenceValidation', 'Validate persistence bindings');