Added vulcanize under third_party/npm_modules

node_modules/vulcanize/example/import-test.css

Index: node_modules/vulcanize/example/import-test.css
diff --git a/bower_components/core-doc-viewer/elements/core-doc-toc.css b/node_modules/vulcanize/example/import-test.css
similarity index 68%
copy from bower_components/core-doc-viewer/elements/core-doc-toc.css
copy to node_modules/vulcanize/example/import-test.css
index 0e6b6b3f87c491dc19f5c3aa793a42424b75b6b3..4fcaf88728f96e92fecdee1043e84ac5895eda84 100644
--- a/bower_components/core-doc-viewer/elements/core-doc-toc.css
+++ b/node_modules/vulcanize/example/import-test.css
@@ -8,20 +8,8 @@
  * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
  */
 
-:host {
-  display: block;
-  position: relative;
-  border-right: 1px solid silver;
-}
-
-core-header-panel {
-  position: absolute;
-  top: 0;
-  left: 0;
-  height: 100%;
-  width: 100%;
-}
-
-core-toolbar {
-  background-color: #eeeeee;
-}
+:host([type="platform"]) { background-color: red; }
+:host([type="core"]) { background-color: red; }
+:host([type="elements"]) { background-color: red; }
+polyfill-next-selector { content: ':host header'; }
+polyfill-next-selector { content: 'I WIN'; }