Create chrome://serviceworker-internals

content/browser/resources/service_worker/serviceworker_internals.css

Index: content/browser/resources/service_worker/serviceworker_internals.css
diff --git a/content/browser/resources/service_worker/serviceworker_internals.css b/content/browser/resources/service_worker/serviceworker_internals.css
new file mode 100644
index 0000000000000000000000000000000000000000..1245f4469df7c407dc79890dce07cf94a28ec3f5
--- /dev/null
+++ b/content/browser/resources/service_worker/serviceworker_internals.css
@@ -0,0 +1,39 @@
+/* Copyright (c) 2014 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. */
+
+.serviceworker-summary {
+    background-color: rgb(235, 239, 249);
+    border-top: 1px solid rgb(156, 194, 239);
+    margin-bottom: 6px;
+    margin-top: 12px;
+    padding: 3px;
+    font-weight: bold;
+}
+
+.serviceworker-item {
+    margin-bottom: 15px;
+    margin-top: 6px;
+    position: relative;
+}
+
+.serviceworker-scope {
+    color: rgb(85, 102, 221);
+    display: inline-block;
+    max-width: 500px;
+    overflow: hidden;
+    padding-bottom: 1px;
+    padding-top: 4px;
+    text-decoration: none;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.serviceworker-version {
+    padding-left: 10px;
+}
+
+.controls a {
+    -webkit-margin-end: 16px;
+    color: #777;
+}