Add Media Router route-details.

chrome/browser/resources/media_router/elements/route-details/route_details.css

Index: chrome/browser/resources/media_router/elements/route-details/route_details.css
diff --git a/chrome/browser/resources/media_router/elements/route-details/route_details.css b/chrome/browser/resources/media_router/elements/route-details/route_details.css
new file mode 100644
index 0000000000000000000000000000000000000000..01bbbfe3aac4407e47d2de4080fcefae5d22cfb4
--- /dev/null
+++ b/chrome/browser/resources/media_router/elements/route-details/route_details.css
@@ -0,0 +1,52 @@
+/* Copyright 2015 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. */
+
+.activity {
+  -webkit-padding-start: 10px;
+}
+
+.activity-description {
+  font-weight: bold;
+  line-height: 1.125em;
+  margin: 8px 0;
+  overflow: hidden;
+}
+
+.activity-status {
+  color: #7d7d7d;

[James Hawkins, 2015/04/08 19:02:36]

nit: Use either #rgb or rgb() consistently in a given file.

[apacible, 2015/04/08 20:02:02]

Done.

+  line-height: 1.125em;
+  margin: 8px 0;
+}
+
+#back-to-devices {
+  -webkit-padding-start: 10px;
+  color: rgb(20, 86, 218);
+  font-weight: bold;
+  line-height: 2em;
+}
+
+#back-to-devices:hover {
+  text-decoration: underline;
+}
+
+button {
+  background: linear-gradient(to top, rgb(254, 254, 254), rgb(222, 222, 222));
+  border: 1px solid rgb(193, 193, 195);
+  color: rgb(44, 44, 44);
+  cursor: pointer;
+  font-size: 1em;
+  font-weight: bold;
+  height: 32px;
+  overflow: hidden;
+  text-align: center;
+  width: 100%;
+}
+
+.device-name {
+  font-weight: bold;
+}
+
+hr {
+  margin: 0;
+}