[Devtools] Added Enable/Disable for request blocking in network

third_party/WebKit/Source/devtools/front_end/network/NetworkPanel.js

Index: third_party/WebKit/Source/devtools/front_end/network/NetworkPanel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/network/NetworkPanel.js b/third_party/WebKit/Source/devtools/front_end/network/NetworkPanel.js
index e3eda70ec4c1382bcd4dd31871f89dbe12c32063..92b093d4f5e9a945cf3548b05aff9353a62d7fdb 100644
--- a/third_party/WebKit/Source/devtools/front_end/network/NetworkPanel.js
+++ b/third_party/WebKit/Source/devtools/front_end/network/NetworkPanel.js
@@ -107,6 +107,29 @@ Network.NetworkPanel = class extends UI.Panel {
     this._networkLogView.addEventListener(Network.NetworkLogView.Events.UpdateRequest, this._onUpdateRequest, this);
 
     Components.DataSaverInfobar.maybeShowInPanel(this);
+
+    var manager = SDK.multitargetNetworkManager;
+    manager.on(SDK.MultitargetNetworkManager.RequestBlockingEnabledChangedEvent, updateIconVisibility.bind(this));
+    manager.addEventListener(SDK.MultitargetNetworkManager.Events.ConditionsChanged, updateIconVisibility.bind(this));
+    var blockedURLsSetting = Common.moduleSetting('networkBlockedURLs');
+    blockedURLsSetting.addChangeListener(updateIconVisibility.bind(this));
+
+    updateIconVisibility.call(this);
+
+    /**
+     * @this {Network.NetworkPanel}
+     */
+    function updateIconVisibility() {
+      var icon = null;
+      if (manager.isThrottling()) {
+        icon = UI.Icon.create('smallicon-warning');
+        icon.title = Common.UIString('Network throttling is enabled');
+      } else if (SDK.multitargetNetworkManager.isRequestBlockingEnabled() && blockedURLsSetting.get().length) {
+        icon = UI.Icon.create('smallicon-warning');
+        icon.title = Common.UIString('Requests may be blocked');
+      }
+      UI.inspectorView.setPanelIcon(this.name, icon);
+    }
   }
 
   /**