ChromeOS: Update Welcome screen material design OOBE.

chrome/browser/resources/chromeos/login/oobe_welcome_secondary_button.css

Index: chrome/browser/resources/chromeos/login/oobe_welcome_secondary_button.css
diff --git a/chrome/browser/resources/chromeos/login/oobe_welcome_secondary_button.css b/chrome/browser/resources/chromeos/login/oobe_welcome_secondary_button.css
new file mode 100644
index 0000000000000000000000000000000000000000..19b9339599909af17aa779a71fe77a7a4829110a
--- /dev/null
+++ b/chrome/browser/resources/chromeos/login/oobe_welcome_secondary_button.css
@@ -0,0 +1,32 @@
+/* Copyright 2016 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. */
+:host {
+  border-color: rgba(0, 0, 0, 0.2);
+  border-radius: 2px;
+  border-style: solid;
+  border-width: 1px;
+  color: #5a5a5a;
+  height: 28px;
+  max-width: 300px;
+  min-width: 120px;
+}
+
+#container {
+  height: 100%;
+  margin: 0;
+  padding: 0 16px 0 16px;
+}
+
+::content * {
+  font: var(--oobe-roboto-medium), sans-serif;
+  font-size: 12px;
+  text-transform: none;
+}
+
+iron-icon {
+  --iron-icon-height: 16px;
+  --iron-icon-width: 16px;
+  color: #5a5a5a;
+  margin: 0 8px 0 0;
+}