Polymer: delete unused files when rsyncing

third_party/polymer/v1_0/extract_inline_scripts.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.
 
 set -e
 
 if [ "$#" -ne 2 ]
 then
   echo "Usage: $0 <src_dir> <dst_dir>"
   echo
   echo "Extracts inlined scripts from <src_dir> to <dst_dir>" \
        "Polymer HTML files found in the destination directory to separate JS" \
        "files. A JS file extracted from the file with name 'foo.html' will" \
        "have a name 'foo-extracted.js'. Inclusion of the script file will be" \
        "added to 'foo.html': '<script src=\"foo-extracted.js\"></script>'."
   exit 1
 fi
 
 src="${1%/}"
 dst="${2%/}"
 
-rsync -c -r -v --exclude="compiled_resources*.gyp" "$src/" "$dst/"
+rsync -c --delete -r -v --exclude="compiled_resources*.gyp" "$src/" "$dst/"
 
 find "$dst" -name "*.html" \
             -not -path "*/demos/*" \
             -not -path "*/test/*" \
             -not -path "*/tests/*" \
             -not -name "demo*.html" \
             -not -name "index.html" \
             -not -name "metadata.html" | \
 xargs grep -l "<script>" | \
 while read original_html_name
 do
   dir=$(dirname "$original_html_name")
   name=$(basename "$original_html_name" .html)
 
   html_without_js="$dir/$name-extracted.html"
   extracted_js="$dir/$name-extracted.js"
   echo "Crisping $original_html_name"
   crisper --script-in-head=false --source "$original_html_name" \
       --html "$html_without_js" --js "$extracted_js"
   mv "$html_without_js" "$original_html_name"
 done