Move grit from DEPS into src.

tools/grit/grit/node/custom/filename.py

Index: tools/grit/grit/node/custom/filename.py
diff --git a/tools/grit/grit/node/custom/filename.py b/tools/grit/grit/node/custom/filename.py
new file mode 100755
index 0000000000000000000000000000000000000000..79a7744f2eb7537b8ca8f21f505318b84c798279
--- /dev/null
+++ b/tools/grit/grit/node/custom/filename.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+# 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.
+
+'''A CustomType for filenames.'''
+
+from grit import clique
+from grit import lazy_re
+
+
+class WindowsFilename(clique.CustomType):
+  '''Validates that messages can be used as Windows filenames, and strips
+  illegal characters out of translations.
+  '''
+
+  BANNED = lazy_re.compile('\+|:|\/|\\\\|\*|\?|\"|\<|\>|\|')
+
+  def Validate(self, message):
+    return not self.BANNED.search(message.GetPresentableContent())
+
+  def ValidateAndModify(self, lang, translation):
+    is_ok = self.Validate(translation)
+    self.ModifyEachTextPart(lang, translation)
+    return is_ok
+
+  def ModifyTextPart(self, lang, text):
+    return self.BANNED.sub(' ', text)