Fix git depot_tools update flow.

gclient.bat

Index: gclient.bat
diff --git a/gclient.bat b/gclient.bat
index 6860903962b65e0e1ae629cb50b2431e2f9b6f8b..422360ffdbf4f8c38dc2652895ae2e20f28c48ec 100755
--- a/gclient.bat
+++ b/gclient.bat
@@ -3,41 +3,8 @@
 :: Use of this source code is governed by a BSD-style license that can be
 :: found in the LICENSE file.
 
-:: This file is a stub to sync .\bootstrap first and defer control to
-:: .\bootstrap\gclient.bat, which will sync back '.'. This is unless auto
-:: update is disabled, were gclient.py is directly called.
-setlocal
+:: Synchronize the root directory before deferring control back to gclient.py.
+call "%~dp0\update_depot_tools.bat"
 
-:: This is required with cygwin only.
-PATH=%~dp0;%PATH%
-
-:: Will download svn and python.
-:: If you don't want to install the depot_tools version of these tools, remove
-:: the 'force' option on the next command. The tools won't be installed only if
-:: not already in the PATH environment variable.
-call "%~dp0bootstrap\win\win_tools.bat" force
-if errorlevel 1 goto :EOF
-
-:: Shall skip automatic update?
-IF "%DEPOT_TOOLS_UPDATE%" == "0" GOTO :SKIP_UPDATE
-:: We can't sync if .\.svn\. doesn't exist.
-IF NOT EXIST "%~dp0.svn\." GOTO :SKIP_UPDATE
-
-:: Sync the bootstrap directory.
-call svn up -q "%~dp0bootstrap"

[M-A Ruel, 2012/03/20 20:31:32]

The problem is that this call in the previous code will trigger, then the next
line will fail since it doesn't exist anymore, causing all gclient users to fail
in their next call.

<3 batch files.

-:: still continue even in case of error.
-goto :UPDATE
-
-
-:SKIP_UPDATE
-:: Don't bother to try to update any thing.
+:: Defer control.
 python "%~dp0\gclient.py" %*
-goto :EOF
-
-
-:UPDATE
-:: Transfer control to ease the update process. The following lines won't be
-:: executed so don't add any! Specifically, don't use 'call' in the following
-:: line.
-"%~dp0bootstrap\gclient.bat" %*
-goto :EOF