Add the Quickoffice viewer toolbar polymer elements.

elements/viewer-toolbar/viewer-toolbar.css

Index: elements/viewer-toolbar/viewer-toolbar.css
diff --git a/elements/viewer-toolbar/viewer-toolbar.css b/elements/viewer-toolbar/viewer-toolbar.css
new file mode 100644
index 0000000000000000000000000000000000000000..27a85cbac82526e5cb07a9a5d97f33e7ac81562c
--- /dev/null
+++ b/elements/viewer-toolbar/viewer-toolbar.css
@@ -0,0 +1,20 @@
+/* Copyright 2013 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 {
+  -webkit-transition: opacity 0.4s ease-in-out;
+  bottom: 0;
+  display: block;
+  font-size: 0;
+  opacity: 1;
+  position: fixed;
+  right: 0;
+  padding: 20px;
+}
+
+#toolbar {
+  border-radius: 3px;
+  box-shadow: 0 1px 2px gray, 0 3px 3px rgba(0, 0, 0, .2);
+  overflow: hidden;
+}