[chromeos] Add an about:power UI.

chrome/browser/resources/chromeos/power.css

Index: chrome/browser/resources/chromeos/power.css
diff --git a/chrome/browser/resources/chromeos/power.css b/chrome/browser/resources/chromeos/power.css
new file mode 100644
index 0000000000000000000000000000000000000000..2ebbdb02c673a29e705cb9d6b05d0bcbf2965022
--- /dev/null
+++ b/chrome/browser/resources/chromeos/power.css
@@ -0,0 +1,28 @@
+/*
+ * Copyright 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.
+ */
+
+#main-layout {
+  margin-left: auto;
+  margin-right: auto;
+  width: 600px;
+}
+
+hr.section-boundary {
+  background: #000;
+  border: 0;
+  height: 2px;
+  width: 100%;
+}
+
+div.plot-canvas-div {

[arv (Not doing code reviews), 2014/01/06 23:29:57]

No need for the tag name here and below

+  overflow: auto;
+  width: 100%;
+}
+
+button.reload-button {
+  margin-bottom: 10px;
+  margin-top: 10px;
+}