DevTools: enable by default disableAgentsWhenProfile experiment

Source/devtools/front_end/main/Main.js

Index: Source/devtools/front_end/main/Main.js
diff --git a/Source/devtools/front_end/main/Main.js b/Source/devtools/front_end/main/Main.js
index 3610f934df92819b9a72c8812b73281b2aae9eed..03516f7c79b0bedacca78139cb53fc59ee22cee4 100644
--- a/Source/devtools/front_end/main/Main.js
+++ b/Source/devtools/front_end/main/Main.js
@@ -161,6 +161,7 @@ WebInspector.Main.prototype = {
 
         if (InspectorFrontendHost.isUnderTest()) {
             // Enable experiments for testing.
+            Runtime.experiments.enableForTest("disableAgentsWhenProfile");
             var testPath = WebInspector.settings.testPath.get();
             if (testPath.indexOf("timeline/") !== -1 || testPath.indexOf("layers/") !== -1)
                 Runtime.experiments.enableForTest("layersPanel");
@@ -169,7 +170,10 @@ WebInspector.Main.prototype = {
             if (testPath.indexOf("documentation/") !== -1)
                 Runtime.experiments.enableForTest("documentation");
         } else {
-            Runtime.experiments.setDefaultExperiments(["timelineOnTraceEvents"]);
+            Runtime.experiments.setDefaultExperiments([
+                "timelineOnTraceEvents",
+                "disableAgentsWhenProfile",
+            ]);
         }
     },