Revert of Check in a simple pure-python based Markdown previewer. (patchset #3 id:90001 of https://codereview.chromium.org/1356203004/ )

Reason for revert:
checklicenses.py is complaining:

http://build.chromium.org/p/chromium/builders/Linux/builds/67561

Original issue's description:
> Check in a simple pure-python based Markdown previewer.
>
> We are now trying to write more and more of our documentation
> as Markdown files that live in the repo, but there's no easy
> way to preview changes in a local checkout.
>
> This CL adds a simple previewing tool written in pure Python
> that depends on the 'Markdown' python package (also pure Python)
> to do all the heavy lifting. It aims to replicate the look
> and feel of googlesource.com as closely as possible.
>
> R=nodir@chromium.org, jam@chromium.org
> BUG=
>
> Committed: https://crrev.com/abe11cb68dd11d5ee153218ba99a3cdba3a3ced6
> Cr-Commit-Position: refs/heads/master@{#352450}

TBR=nodir@chromium.org,jam@chromium.org,scottmg@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1389543003

Cr-Commit-Position: refs/heads/master@{#352503}

6 files changed, 0 insertions, 444 deletions

diff --git a/tools/md_browser/OWNERS b/tools/md_browser/OWNERS
deleted file mode 100644
index 3fc266c..0000000
--- a/tools/md_browser/OWNERS
+++ /dev/null
@@ -1,2 +0,0 @@
-dpranke@chromium.org
-nodir@chromium.org
diff --git a/tools/md_browser/README.md b/tools/md_browser/README.md
deleted file mode 100644
index 05d6b9d..0000000
--- a/tools/md_browser/README.md
+++ /dev/null
@@ -1,27 +0,0 @@
-# md_browser
-
-This is a simple tool to render the markdown docs in a chromium checkout
-locally. It is written in Python and uses the Python 'markdown' package,
-which is checked into src/third_party.
-
-md_browser attempts to emulate the flavor of Markdown implemented by
-[Gitiles](https://gerrit.googlesource.com/gitiles/+/master/Documentation/markdown.md).
-
-Gitiles is the source browser running on https://chromium.googlesource.com,
-and can be run locally, but to do so requires a Java install and a Buck
-install, which can be slightly annoying to set up on Mac or Windows.
-
-This is a lighterweight solution, which also allows you to preview uncommitted
-changes (i.e., it just serves files out of the filesystem, and is not a
-full Git repo browser like Gitiles is).
-
-To run md_browser:
-
-1. cd to the top of your chromium checkout
-
-2. run `python tools/md_browser/md_browser.py`
-
-3. There is no step three.
-
-This will run a local web server on port 8080 that points to the top
-of the repo.  You can specify a different port with the `-p` flag.
diff --git a/tools/md_browser/doc.css b/tools/md_browser/doc.css
deleted file mode 100644
index 93ea5fc..0000000
--- a/tools/md_browser/doc.css
+++ /dev/null
@@ -1,298 +0,0 @@
-/**
- * Copyright 2015 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.
- */
-
-/* This file is cloned from
- * https://gerrit.googlesource.com/gitiles/+/master/gitiles-servlet/src/main/resources/com/google/gitiles/static/doc.css
- */
-
-html.doc-page, .doc {
-  font-family: arial,sans-serif;
-}
-.doc-page body {
-  margin: 0;
-}
-
-.banner {
-  min-height: 44px;
-  margin: 0;
-  padding: 14px 15px 13px;
-  border-bottom: 1px solid #eee;
-}
-.banner h1, .banner h2 {
-  float: left;
-  font-size: 32px;
-  font-weight: 300;
-  line-height: 1.375;
-  margin: 0;
-}
-.banner img {
-  margin: -1px 10px -4px 0px;
-  vertical-align: middle;
-}
-.banner a, .banner a:hover {
-  text-decoration: none;
-}
-.banner, .banner a:link, .banner a:visited {
-  color: #777;
-}
-.banner h2:before {
-  border-right: 1px solid #eee;
-  content: "";
-  float: left;
-  height: 44px;
-  margin: 0 12px 0 14px;
-}
-
-.nav, .footer-line {
-  color: #333;
-  padding: 0 15px;
-  background: #eee;
-}
-.nav ul {
-  list-style: none;
-  margin: 0;
-  padding: 6px 0;
-}
-.nav li {
-  float: left;
-  font-size: 14px;
-  line-height: 1.43;
-  margin: 0 20px 0 0;
-  padding: 6px 0;
-}
-.nav li a, .footer-line a {
-  color: #7a7af9;
-}
-.nav li a:hover {
-  color: #0000f9;
-}
-.banner:after, .nav ul:after, .cols:after {
-  clear: both;
-  content: "";
-  display: block;
-}
-
-.nav-aux, .doc {
-  max-width: 978px;
-}
-.nav-aux, .doc-page .doc {
-  margin: auto;
-}
-
-.footer-break {
-  clear: both;
-  margin: 120px 0 0 0;
-}
-.footer-line {
-  font-size: 13px;
-  line-height: 30px;
-  height: 30px;
-}
-.footer-line ul {
-  list-style: none;
-  margin: 0;
-  padding: 0;
-}
-.footer-line li {
-  display: inline;
-}
-.footer-line li+li:before {
-  content: "·";
-  padding: 0 5px;
-}
-.footer-line .nav-aux {
-  position: relative;
-}
-.gitiles-att {
-  color: #A0ADCC;
-  position: absolute;
-  top: 0;
-  right: 0;
-}
-.gitiles-att a {
-  font-style: italic;
-}
-
-/* Markdown rendered in /+doc/ or tree view page . */
-
-.doc {
-  color: #444;
-  font-size: 13px;
-  line-height: normal;
-}
-
-.doc h1, .doc h2, .doc h3, .doc h4, .doc h5, .doc h6 {
-  font-family: "open sans",arial,sans-serif;
-  font-weight: bold;
-  color: #444;
-  height: auto;
-  white-space: normal;
-  overflow: visible;
-  margin: 0.67em 0 0.67em 0;
-}
-.doc h1 {
-  font-size: 20px;
-  margin: 0.67em 0 0.67em 0;
-}
-.doc h2 {
-  font-size: 16px;
-  margin: 0.67em 0 0.67em 0;
-}
-.doc h3 {
-  font-size: 14px;
-  margin: 0.67em 0 0.67em 0;
-}
-.doc h4 {
-  font-size: 13px;
-  margin: 1em 0 1em 0;
-}
-.doc h5 {
-  font-size: 13px;
-  margin: 1.3em 0 1.3em 0;
-}
-.doc h6 {
-  font-size: 13px;
-  margin: 1.6em 0 1.6em 0;
-}
-
-.doc a { text-decoration: none; }
-.doc a:link { color: #245dc1; }
-.doc a:visited { color: #7759ae; }
-.doc a:hover { text-decoration: underline; }
-
-.doc ul, .doc ol {
-  margin: 10px 10px 10px 30px;
-  padding: 0;
-}
-
-.doc img {
-  border: 0;
-  max-width: 100%;
-}
-.doc iframe {
-  min-width: 100px;
-  min-height: 30px;
-}
-iframe.noborder {
-  border: 0;
-}
-
-.doc em {
-  font-weight: normal;
-  font-style: italic;
-}
-.doc strong {
-  font-weight: bold;
-  color: inherit;
-}
-
-.doc pre {
-  border: 1px solid silver;
-  background: #fafafa;
-  margin: 0 2em 0 2em;
-  padding: 2px;
-}
-.doc code, .doc .code {
-  color: #060;
-  font: 13px/1.54 "courier new",courier,monospace;
-}
-
-.doc dl dt {
-  margin-top: 1em;
-}
-
-.doc table {
-  border-collapse: collapse;
-  border-spacing: 0;
-}
-.doc th {
-  text-align: center;
-}
-.doc th, .doc td {
-  border: 1px solid #eee;
-  padding: 4px 12px;
-  vertical-align: top;
-}
-.doc th {
-  background-color: #f5f5f5;
-}
-
-.toc {
-  margin-top: 30px;
-}
-.toc-aux {
-  padding: 2px;
-  background: #f9f9f9;
-  border: 1px solid #f2f2f2;
-  border-radius: 4px;
-}
-.toc h2 {
-  margin: 0 0 5px 0;
-}
-.toc ul {
-  margin: 0 0 0 30px;
-}
-.toc ul li {
-  margin-left: 0px;
-  list-style: disc;
-}
-.toc ul ul li {
-  list-style: circle;
-}
-
-.note, .promo, .aside {
-  border: 1px solid;
-  border-radius: 4px;
-  margin: 10px 0;
-  padding: 10px;
-}
-.note {
-  background: #fffbe4;
-  border-color: #f8f6e6;
-}
-.promo {
-  background: #f6f9ff;
-  border-color: #eff2f9;
-}
-.aside {
-  background: #f9f9f9;
-  border-color: #f2f2f2;
-}
-.note :first-child,
-.promo :first-child,
-.aside :first-child {
-  margin-top: 0;
-}
-.note p:last-child,
-.promo p:last-child,
-.aside p:last-child {
-  margin-bottom: 0;
-}
-
-.cols {
-  margin: 0 -1.533%;
-  width: 103.067%;
-}
-.col-1, .col-2, .col-3, .col-4, .col-5, .col-6,
-.col-7, .col-8, .col-9, .col-10, .col-11, .col-12 {
-  float: left;
-  margin: 0 1.488% 20px;
-}
-.col-1 { width: 5.357%; }
-.col-2 { width: 13.690%; }
-.col-3 { width: 22.024%; }
-.col-4 { width: 30.357%; }
-.col-5 { width: 38.690%; }
-.col-6 { width: 47.024%; }
-.col-7 { width: 55.357%; }
-.col-8 { width: 63.690%; }
-.col-9 { width: 72.024%; }
-.col-10 { width: 80.357%; }
-.col-11 { width: 88.690%; }
-.col-12 { width: 97.024%; }
-.cols hr {
-  width: 80%;
-}
diff --git a/tools/md_browser/footer.html b/tools/md_browser/footer.html
deleted file mode 100644
index 8aab624..0000000
--- a/tools/md_browser/footer.html
+++ /dev/null
@@ -1,8 +0,0 @@
-<div class="footer-break"></div>
-<div class="footer-line">
-<div class="nav-aux">
-<div class="gitiles-att"></div>
-</div>
-</div>
-</body>
-</html>
diff --git a/tools/md_browser/header.html b/tools/md_browser/header.html
deleted file mode 100644
index 939eb94..0000000
--- a/tools/md_browser/header.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<!DOCTYPE HTML PUBLIC "-//W3CDTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
-<html class="doc-page">
-<head>
-<link rel="stylesheet" type="text/css" href="/doc.css" />
-</head>
-<body>
-<div class="doc">
diff --git a/tools/md_browser/md_browser.py b/tools/md_browser/md_browser.py
deleted file mode 100644
index 7fb51eb2..0000000
--- a/tools/md_browser/md_browser.py
+++ /dev/null
@@ -1,102 +0,0 @@
-# Copyright 2015 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.
-
-"""Simple Markdown browser for a Git checkout."""
-from __future__ import print_function
-
-import SimpleHTTPServer
-import SocketServer
-import argparse
-import codecs
-import os
-import socket
-import sys
-
-
-THIS_DIR = os.path.abspath(os.path.dirname(__file__))
-SRC_DIR = os.path.dirname(os.path.dirname(THIS_DIR))
-sys.path.append(os.path.join(SRC_DIR, 'third_party', 'Python-Markdown'))
-import markdown
-
-
-def main(argv):
-  parser = argparse.ArgumentParser(prog='md_browser')
-  parser.add_argument('-p', '--port', type=int, default=8080,
-                      help='port to run on (default = %(default)s)')
-  args = parser.parse_args(argv)
-
-  try:
-    s = Server(args.port, SRC_DIR)
-    print("Listening on http://localhost:%s/" % args.port)
-    s.serve_forever()
-    s.shutdown()
-    return 0
-  except KeyboardInterrupt:
-    return 130
-
-
-class Server(SocketServer.TCPServer):
-  def __init__(self, port, top_level):
-    SocketServer.TCPServer.__init__(self, ('0.0.0.0', port), Handler)
-    self.port = port
-    self.top_level = top_level
-
-  def server_bind(self):
-    self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-    self.socket.bind(self.server_address)
-
-
-class Handler(SimpleHTTPServer.SimpleHTTPRequestHandler):
-  def do_GET(self):
-    full_path = os.path.abspath(os.path.join(self.server.top_level,
-                                             self.path[1:]))
-    if not full_path.startswith(SRC_DIR):
-      self._DoUnknown()
-    elif self.path == '/doc.css':
-      self._WriteTemplate('doc.css')
-    elif not os.path.exists(full_path):
-      self._DoNotFound()
-    elif self.path.lower().endswith('.md'):
-      self._DoMD()
-    else:
-      self._DoUnknown()
-
-  def _DoMD(self):
-    extensions = [
-        'markdown.extensions.fenced_code',
-        'markdown.extensions.tables',
-        'markdown.extensions.toc',
-    ]
-
-    contents = self._Read(self.path[1:])
-    md_fragment = markdown.markdown(contents,
-                                    extensions=extensions,
-                                    output_format='html4').encode('utf-8')
-    try:
-      self._WriteTemplate('header.html')
-      self.wfile.write(md_fragment)
-      self._WriteTemplate('footer.html')
-    except:
-      raise
-
-  def _DoNotFound(self):
-    self.wfile.write('<html><body>%s not found</body></html>' % self.path)
-
-  def _DoUnknown(self):
-    self.wfile.write('<html><body>I do not know how to serve %s.</body>'
-                       '</html>' % self.path)
-
-  def _Read(self, relpath):
-    assert not relpath.startswith(os.sep)
-    path = os.path.join(self.server.top_level, relpath)
-    with codecs.open(path, encoding='utf-8') as fp:
-      return fp.read()
-
-  def _WriteTemplate(self, template):
-    contents = self._Read(os.path.join('tools', 'md_browser', template))
-    self.wfile.write(contents.encode('utf-8'))
-
-
-if __name__ == '__main__':
-  sys.exit(main(sys.argv[1:]))