Add paper-menu-button and its dependencies to third_party/polymer

third_party/polymer/v1_0/reproduce.sh

 #!/bin/bash
 
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Reproduces the content of 'components' and 'components-chromium' using the
 # list of dependencies from 'bower.json'. Downloads needed packages and makes
 # Chromium specific modifications. To launch the script you need 'bower',
 # 'crisper', and 'vulcanize' installed on your system.
@@ skipping 22 matching lines @@
 
 # Test and demo directories aren't needed.
 rm -rf components/*/{test,demo}
 rm -rf components/polymer/explainer
 
 # Remove promise-polyfill and components which depend on it.
 rm -rf components/promise-polyfill
 rm -rf components/iron-ajax
 rm -rf components/iron-form
 
+# Remove iron-image as it's only a developer dependency of iron-dropdown.
+# https://github.com/PolymerElements/iron-dropdown/pull/17
+rm -rf components/iron-image
+
 # Make checkperms.py happy.
 find components/*/hero.svg -type f -exec chmod -x {} \;
 find components/iron-selector -type f -exec chmod -x {} \;
 
 # Remove carriage returns to make CQ happy.
 find components -type f \( -name \*.html -o -name \*.css -o -name \*.js\
   -o -name \*.md -o -name \*.sh -o -name \*.json -o -name \*.gitignore\
   -o -name \*.bat \) -print0 | xargs -0 sed -i -e $'s/\r$//g'
 
 # Resolve a unicode encoding issue in dom-innerHTML.html.
 NBSP=$(python -c 'print u"\u00A0".encode("utf-8")')
 sed -i 's/['"$NBSP"']/\\u00A0/g' components/polymer/polymer-mini.html
 
 # Remove import of external resource in font-roboto (fonts.googleapis.com).
 patch -p1 < chromium.patch
 
 ./extract_inline_scripts.sh components components-chromium