[third_party] add polymer 1.2.3

polymer_1.2.3/bower_components/iron-media-query/README.md

Index: polymer_1.2.3/bower_components/iron-media-query/README.md
diff --git a/polymer_1.2.3/bower_components/iron-media-query/README.md b/polymer_1.2.3/bower_components/iron-media-query/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..a2c553d9dda71000013b8d58a8a41673acb46d72
--- /dev/null
+++ b/polymer_1.2.3/bower_components/iron-media-query/README.md
@@ -0,0 +1,28 @@
+
+<!---
+
+This README is automatically generated from the comments in these files:
+iron-media-query.html
+
+Edit those files, and our readme bot will duplicate them over here!
+Edit this file, and the bot will squash your changes :)
+
+-->
+
+[![Build Status](https://travis-ci.org/PolymerElements/iron-media-query.svg?branch=master)](https://travis-ci.org/PolymerElements/iron-media-query)
+
+_[Demo and API Docs](https://elements.polymer-project.org/elements/iron-media-query)_
+
+
+##&lt;iron-media-query&gt;
+
+
+`iron-media-query` can be used to data bind to a CSS media query.
+The `query` property is a bare CSS media query.
+The `query-matches` property is a boolean representing whether the page matches that media query.
+
+Example:
+
+    <iron-media-query query="(min-width: 600px)" query-matches="{{queryMatches}}"></iron-media-query>
+
+