[DevTools] Show blocked requests in Network panel.

Source/devtools/front_end/sdk/NetworkManager.js

Index: Source/devtools/front_end/sdk/NetworkManager.js
diff --git a/Source/devtools/front_end/sdk/NetworkManager.js b/Source/devtools/front_end/sdk/NetworkManager.js
index 29ab862de358d7f186b0d3d951041954ed03252a..581b6dfc331ba1568b533ff2df3b1f83f3e6fb8f 100644
--- a/Source/devtools/front_end/sdk/NetworkManager.js
+++ b/Source/devtools/front_end/sdk/NetworkManager.js
@@ -431,9 +431,9 @@ WebInspector.NetworkDispatcher.prototype = {
      * @param {!PageAgent.ResourceType} resourceType
      * @param {string} localizedDescription
      * @param {boolean=} canceled
-     * @param {boolean=} blocked
+     * @param {!NetworkAgent.BlockedReason=} blockedReason
      */
-    loadingFailed: function(requestId, time, resourceType, localizedDescription, canceled, blocked)
+    loadingFailed: function(requestId, time, resourceType, localizedDescription, canceled, blockedReason)
     {
         var networkRequest = this._inflightRequestsById[requestId];
         if (!networkRequest)
@@ -442,7 +442,8 @@ WebInspector.NetworkDispatcher.prototype = {
         networkRequest.failed = true;
         networkRequest.setResourceType(WebInspector.resourceTypes[resourceType]);
         networkRequest.canceled = canceled;
-        networkRequest.blocked = blocked;
+        if (blockedReason)
+            networkRequest.setBlockedReason(blockedReason);
         networkRequest.localizedFailDescription = localizedDescription;
         this._finishNetworkRequest(networkRequest, time, -1);
     },