Fix deleted empty files.

patch.py

 # coding=utf8
 # Copyright (c) 2011 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.
 """Utility functions to handle patches."""
 
 import posixpath
 import os
 import re
 
@@ skipping 271 matching lines @@
     match = re.match(r'^(rename|copy) to (.+)$', line)
     if match:
       if self.filename != match.group(2):
         self._fail('Unexpected git diff output name for line %s.' % line)
       if not last_line.startswith('%s from ' % match.group(1)):
         self._fail(
             'Confused %s from/to git diff for line %s.' %
                 (match.group(1), line))
       return
 
-    # Ignore "deleted file mode 100644" since it's not needed.
+    match = re.match(r'^deleted file mode (\d{6})$', line)
+    if match:
+      # It is necessary to parse it because there may be no hunk, like when the
+      # file was empty.
+      self.is_delete = True
+      return
+
     match = re.match(r'^new(| file) mode (\d{6})$', line)
     if match:
       mode = match.group(2)
       # Only look at owner ACL for executable.
       # TODO(maruel): Add support to remove a property.
       if bool(int(mode[4]) & 1):
         self.svn_properties.append(('svn:executable', '*'))
+      return
 
     match = re.match(r'^--- (.*)$', line)
     if match:
       if last_line[:3] in ('---', '+++'):
         self._fail('--- and +++ are reversed')
       if match.group(1) == '/dev/null':
         self.is_new = True
       elif self.mangle(match.group(1)) != old:
         # git patches are always well formatted, do not allow random filenames.
         self._fail('Unexpected git diff: %s != %s.' % (old, match.group(1)))
@@ skipping 97 matching lines @@
   def __iter__(self):
     for patch in self.patches:
       yield patch
 
   def __getitem__(self, key):
     return self.patches[key]
 
   @property
   def filenames(self):
     return [p.filename for p in self.patches]