Added vulcanize under third_party/npm_modules

node_modules/vulcanize/example/empty.css

Index: node_modules/vulcanize/example/empty.css
diff --git a/bower_components/paper-icon-button/pulse-ink.css b/node_modules/vulcanize/example/empty.css
similarity index 77%
copy from bower_components/paper-icon-button/pulse-ink.css
copy to node_modules/vulcanize/example/empty.css
index 4a7985bbab00e81ff28a7932a2569c7ef0a1d922..f296c848f99077b2edde8625ed0fbdb80fbcfcca 100644
--- a/bower_components/paper-icon-button/pulse-ink.css
+++ b/node_modules/vulcanize/example/empty.css
@@ -8,13 +8,3 @@
  * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
  */
 
-@-webkit-keyframes pulse-ink {
-  0% {
-    -webkit-transform: scale(0);
-    opacity: 0;
-  }
-  100% {
-    -webkit-transform: scale(1);
-    opacity: 0.9;
-  }
-}