Add 'git clean -f -d' to 'gclient revert' when in a git repo.

gclient_scm.py

 # Copyright (c) 2012 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.
 
 """Gclient-specific SCM-specific operations."""
 
 import logging
 import os
 import posixpath
 import re
@@ skipping 522 matching lines @@
 
     default_rev = "refs/heads/master"
     _, deps_revision = gclient_utils.SplitUrlRevision(self.url)
     if not deps_revision:
       deps_revision = default_rev
     if deps_revision.startswith('refs/heads/'):
       deps_revision = deps_revision.replace('refs/heads/', 'origin/')
 
     files = self._Capture(['diff', deps_revision, '--name-only']).split()
     self._Run(['reset', '--hard', deps_revision], options)
+    self._Run(['clean', '-f', '-d'], options)
     file_list.extend([os.path.join(self.checkout_path, f) for f in files])
 
   def revinfo(self, options, args, file_list):
     """Returns revision"""
     return self._Capture(['rev-parse', 'HEAD'])
 
   def runhooks(self, options, args, file_list):
     self.status(options, args, file_list)
 
   def status(self, options, args, file_list):
@@ skipping 646 matching lines @@
       new_command.append('--force')
       if command[0] != 'checkout' and scm.SVN.AssertVersion('1.6')[0]:
         new_command.extend(('--accept', 'theirs-conflict'))
     elif options.manually_grab_svn_rev:
       new_command.append('--force')
       if command[0] != 'checkout' and scm.SVN.AssertVersion('1.6')[0]:
         new_command.extend(('--accept', 'postpone'))
     elif command[0] != 'checkout' and scm.SVN.AssertVersion('1.6')[0]:
       new_command.extend(('--accept', 'postpone'))
     return new_command