[Telemetry] Migrate find_dependencies internals to tools/perf

tools/perf/core/bootstrap.py

 # 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.
 
 """Bootstrap Chrome Telemetry by downloading all its files from SVN servers.
 
 Requires a DEPS file to specify which directories on which SVN servers
 are required to run Telemetry. Format of that DEPS file is a subset of the
 normal DEPS file format[1]; currently only only the "deps" dictionary is
 supported and nothing else.
 
 Fetches all files in the specified directories using WebDAV (SVN is WebDAV under
 the hood).
 
 [1] http://dev.chromium.org/developers/how-tos/depottools#TOC-DEPS-file
 """
 
 import imp
 import logging
 import os
 import urllib
 import urlparse
 
 # Dummy module for DAVclient.
 davclient = None
 
 
+# TODO(eakuefner): Switch this link to tools/perf version after verifying.
 # Link to file containing the 'davclient' WebDAV client library.
 _DAVCLIENT_URL = ('https://src.chromium.org/chrome/trunk/src/tools/'
                   'telemetry/third_party/davclient/davclient.py')
 
 
 def _DownloadAndImportDAVClientModule():
   """Dynamically import davclient helper library."""
   global davclient
   davclient_src = urllib.urlopen(_DAVCLIENT_URL).read()
   davclient = imp.new_module('davclient')
@@ skipping 113 matching lines @@
   for dst_path, src_path in deps.iteritems():
     full_dst_path = os.path.join(destination_dir, dst_path)
     parsed_url = urlparse.urlparse(src_path)
     root_url = parsed_url.scheme + '://' + parsed_url.netloc
 
     dav_client = DAVClientWrapper(root_url)
     dav_client.Traverse(parsed_url.path, full_dst_path)
 
   for url in deps_includes.values():
     DownloadDeps(destination_dir, url)