Apply content-security-policy directive to chrome://workers page.

chrome/browser/resources/workers/workers.js

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+function requestData() {
+  var xhr = new XMLHttpRequest();
+  xhr.open('GET', 'workers_data.json', false);
+  xhr.send(null);
+  if (xhr.status === 200)
+     return JSON.parse(xhr.responseText);
+  return [];
+}
+
+function addColumn(row, value) {
+  var column = document.createElement("td");
+  column.textContent = value;
+  row.appendChild(column);
+}
+
+function openDevTools(workerProcessHostId, workerRouteId) {
+  chrome.send("openDevTools",
+              [String(workerProcessHostId), String(workerRouteId)]);
+}
+
+function populateWorkerList() {
+  var data = requestData();
+
+  var worker_properties = ["workerRouteId", "url", "name", "pid"];
+
+  var list = document.getElementById("workers-table");
+  for (var i = 0; i < data.length; i++) {
+    var workerData = data[i];
+    var row = document.createElement("tr");
+    for (var j = 0; j < worker_properties.length; j++)
+      addColumn(row, workerData[worker_properties[j]]);
+
+    var column = document.createElement("td");
+    var link = document.createElement("a");
+    link.setAttribute("href", "#");
+    link.textContent = "inspect";
+    link.addEventListener(
+        "click",
+        openDevTools.bind(this,
+                          workerData.workerProcessHostId,
+                          workerData.workerRouteId),
+        true);
+    column.appendChild(link);
+    row.appendChild(column);
+
+    list.appendChild(row);
+  }
+}
+
+document.addEventListener('DOMContentLoaded', populateWorkerList);