Add git-gs

Review URL: http://codereview.chromium.org/164417


git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@23210 0039d316-1c4b-4281-b951-d872f2087c98

git-gs

@@ -0,0 +1,9 @@
+#!/bin/sh
+# Copyright (c) 2009 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.
+git grep -e "$@" -- "*.h" "*.hpp" "*.cpp" "*.c" "*.cc" "*.cpp" "*.inl"\
+   "*.grd" "*.idl" "*.m" "*.mm"\
+   "*SConscript" "SConscript*" "*.scons" "*.vcproj" "*.vsprops"\
+   "*.gyp" "*.gypi"
+