[DevTools] Implementation of resource requests blocked by specific urls.

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 8cc2be0a09faef260b4479363e61aef4c23dfd37..5fcf36c31faa15c256ab9ca6d89e1d3724527ea2 100644
--- a/Source/devtools/front_end/main/Main.js
+++ b/Source/devtools/front_end/main/Main.js
@@ -125,6 +125,7 @@ WebInspector.Main.prototype = {
         Runtime.experiments.register("animationInspection", "Animation Inspection");
         Runtime.experiments.register("applyCustomStylesheet", "Allow custom UI themes");
         Runtime.experiments.register("blackboxJSFramesOnTimeline", "Blackbox JavaScript frames on Timeline", true);
+        Runtime.experiments.register("blockedURLs", "Blocked resource URLs", true);
         Runtime.experiments.register("colorContrastRatio", "Contrast ratio line in color picker", true);
         Runtime.experiments.register("timelineTreeView", "Costly functions tree view on the Timeline", true);
         Runtime.experiments.register("colorPalettes", "Color palettes");