[MD Bookmarks] Add toasts.

ui/webui/resources/polymer_resources.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!--
   This file is generated.
   Please use 'src/tools/polymer/polymer_grdp_to_txt.py' and
   'src/tools/polymer/txt_to_polymer_grdp.py' to modify it, if possible.
 
   'polymer_grdp_to_txt.py' converts 'polymer_resources.grdp' to a plain list of
   used Polymer components:
     ...
     iron-iron-iconset/iron-iconset-extracted.js
@@ skipping 716 matching lines @@
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_PAPER_TABS_PAPER_TABS_HTML"
              file="../../../third_party/polymer/v1_0/components-chromium/paper-tabs/paper-tabs.html"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_PAPER_TOGGLE_BUTTON_PAPER_TOGGLE_BUTTON_EXTRACTED_JS"
              file="../../../third_party/polymer/v1_0/components-chromium/paper-toggle-button/paper-toggle-button-extracted.js"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_PAPER_TOGGLE_BUTTON_PAPER_TOGGLE_BUTTON_HTML"
              file="../../../third_party/polymer/v1_0/components-chromium/paper-toggle-button/paper-toggle-button.html"
              type="chrome_html" />
+  <structure name="IDR_POLYMER_1_0_PAPER_TOAST_PAPER_TOAST_EXTRACTED_JS"
+             file="../../../third_party/polymer/v1_0/components-chromium/paper-toast/paper-toast-extracted.js"
+             type="chrome_html" />
+  <structure name="IDR_POLYMER_1_0_PAPER_TOAST_PAPER_TOAST_HTML"
+             file="../../../third_party/polymer/v1_0/components-chromium/paper-toast/paper-toast.html"
+             type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_PAPER_TOOLBAR_PAPER_TOOLBAR_EXTRACTED_JS"
              file="../../../third_party/polymer/v1_0/components-chromium/paper-toolbar/paper-toolbar-extracted.js"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_PAPER_TOOLBAR_PAPER_TOOLBAR_HTML"
              file="../../../third_party/polymer/v1_0/components-chromium/paper-toolbar/paper-toolbar.html"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_PAPER_TOOLTIP_PAPER_TOOLTIP_EXTRACTED_JS"
              file="../../../third_party/polymer/v1_0/components-chromium/paper-tooltip/paper-tooltip-extracted.js"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_PAPER_TOOLTIP_PAPER_TOOLTIP_HTML"
@@ skipping 15 matching lines @@
              file="../../../third_party/polymer/v1_0/components-chromium/polymer/polymer-mini.html"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_POLYMER_POLYMER_HTML"
              file="../../../third_party/polymer/v1_0/components-chromium/polymer/polymer.html"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_WEB_ANIMATIONS_JS_WEB_ANIMATIONS_NEXT_LITE_MIN_JS"
              file="../../../third_party/web-animations-js/sources/web-animations-next-lite.min.js"
              type="chrome_html" />
 </grit-part>