Move grit from DEPS into src.

tools/grit/grit/tool/preprocess_interface.py

Index: tools/grit/grit/tool/preprocess_interface.py
diff --git a/tools/grit/grit/tool/preprocess_interface.py b/tools/grit/grit/tool/preprocess_interface.py
new file mode 100755
index 0000000000000000000000000000000000000000..4c5456c6de33bd1f31d489b1072e559f0fd431d2
--- /dev/null
+++ b/tools/grit/grit/tool/preprocess_interface.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.
+
+''' Base class for preprocessing of RC files.
+'''
+
+
+class PreProcessor(object):
+  ''' Base class for preprocessing of the RC file data before being
+  output through the RC2GRD tool. You should implement this class if
+  you have specific constructs in your RC files that GRIT cannot handle.'''
+
+
+  def Process(self, rctext, rcpath):
+    ''' Processes the data in rctext.
+    Args:
+      rctext: string containing the contents of the RC file being processed
+      rcpath: the path used to access the file.
+
+    Return:
+      The processed text.
+    '''
+    raise NotImplementedError()
+
+
+