[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..3f01c504e0b6ce40d17a7ceaa04ca9ed359a208c 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 +107,24 @@ 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, updateVisibility);
+    manager.addEventListener(SDK.MultitargetNetworkManager.Events.ConditionsChanged, updateVisibility);
+    var blockedURLsSetting = Common.moduleSetting('networkBlockedURLs');
+    blockedURLsSetting.addChangeListener(updateVisibility);
+
+    function updateVisibility() {
+      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) {

[pfeldman, 2017/02/13 18:24:26]

You don't need to check the blocked url length. setting is on -> blocking is
engaged -> warning.

[allada, 2017/02/16 21:42:02]

I thought it'd be better to allow the user to keep the setting on but have
nothing in the list to filter out. In which case we should only show the warning
when it "might" actually filter stuff out.

+        icon = UI.Icon.create('smallicon-warning');
+        icon.title = Common.UIString('Requests may be blocked');
+      }
+      UI.inspectorView.setPanelIcon('network', icon);

[pfeldman, 2017/02/13 18:24:26]

this.name

[allada, 2017/02/16 21:42:03]

Done.

+    }
   }
 
   /**