[MD Bookmarks] Add import/export bookmarks HTML features

chrome/browser/resources/md_bookmarks/toolbar.js

Index: chrome/browser/resources/md_bookmarks/toolbar.js
diff --git a/chrome/browser/resources/md_bookmarks/toolbar.js b/chrome/browser/resources/md_bookmarks/toolbar.js
index 53f002b1be97266b99a0c2b896313ee45b403922..5b80c74fbef76ca922d66d67cd7c0c724778a044 100644
--- a/chrome/browser/resources/md_bookmarks/toolbar.js
+++ b/chrome/browser/resources/md_bookmarks/toolbar.js
@@ -43,12 +43,14 @@ Polymer({
   },
 
   /** @private */
-  onAddImportTap_: function() {
+  onImportTap_: function() {
+    chrome.bookmarks.import();
     this.closeDropdownMenu_();
   },
 
   /** @private */
-  onAddExportTap_: function() {
+  onExportTap_: function() {
+    chrome.bookmarks.export();
     this.closeDropdownMenu_();
   },