Move grit from DEPS into src.

tools/grit/PRESUBMIT.py

Index: tools/grit/PRESUBMIT.py
diff --git a/tools/grit/PRESUBMIT.py b/tools/grit/PRESUBMIT.py
new file mode 100644
index 0000000000000000000000000000000000000000..700168999caf4966f5d2a8dd43682b3cd4c23291
--- /dev/null
+++ b/tools/grit/PRESUBMIT.py
@@ -0,0 +1,22 @@
+# 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.
+
+"""grit unittests presubmit script.
+
+See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts for
+details on the presubmit API built into gcl.
+"""
+
+
+def RunUnittests(input_api, output_api):
+  return input_api.canned_checks.RunPythonUnitTests(input_api, output_api,
+      ['grit.test_suite_all'])
+
+
+def CheckChangeOnUpload(input_api, output_api):
+  return RunUnittests(input_api, output_api)
+
+
+def CheckChangeOnCommit(input_api, output_api):
+  return RunUnittests(input_api, output_api)