Make accessibility a regular DevTools 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 6ef894db76a357380f634a0295f825a42c319b8b..8aef2e370c7560d8b7bd3a0c84f6a6db028eb671 100644
--- a/Source/devtools/front_end/main/Main.js
+++ b/Source/devtools/front_end/main/Main.js
@@ -112,7 +112,7 @@ WebInspector.Main.prototype = {
     _initializeExperiments: function(prefs)
     {
         Runtime.experiments.register("emptySourceMapAutoStepping", "Empty sourcemap auto-stepping");
-        Runtime.experiments.register("accessibilityInspection", "Accessibility Inspection", true);
+        Runtime.experiments.register("accessibilityInspection", "Accessibility Inspection");
         Runtime.experiments.register("animationInspection", "Animation Inspection");
         Runtime.experiments.register("applyCustomStylesheet", "Allow custom UI themes");
         Runtime.experiments.register("blackboxJSFramesOnTimeline", "Blackbox JavaScript frames on Timeline");