Delete gcl, drover, and trychange

drover

Index: drover
diff --git a/drover b/drover
deleted file mode 100755
index 12dc53e4e0957fee97446baa8c37e75df109882b..0000000000000000000000000000000000000000
--- a/drover
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/usr/bin/env bash
-# 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.
-
-# This script will try to sync the bootstrap directories and then defer control.
-
-base_dir=$(dirname "$0")
-
-# Use the batch file as an entry point if on cygwin.
-if [ "${OSTYPE}" = "cygwin" -a "${TERM}" != "xterm" ]; then
-   ${base_dir}/drover.bat "$@"
-   exit
-fi
-
-
-# We're on POSIX (not cygwin). We can now safely look for svn checkout.
-if [ "X$DEPOT_TOOLS_UPDATE" != "X0" -a -e "${base_dir}/.svn" ]
-then
-  # Update the bootstrap directory to stay up-to-date with the latest
-  # depot_tools.
-  svn -q up "${base_dir}"
-fi
-
-PYTHONDONTWRITEBYTECODE=1 exec python "${base_dir}/drover.py" "$@"