Issue 507301: gclient doesn't work on a path with space characters

bootstrap/win/win_tools.bat

 @echo off
 :: 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.
 
 :: This script will try to find if svn and python are accessible and it not,
 :: it will try to download it and 'install' it in depot_tools.
 
 :: Sadly, we can't use SETLOCAL here otherwise it ERRORLEVEL is not correctly
 :: returned.
@@ skipping 50 matching lines @@
   set GIT_VERSION=1.9.5.chromium.6
 ) else (
   set GIT_VERSION=1.9.5.chromium.6
 )
 for /f "tokens=2 delims=[]" %%i in ('ver') do set VERSTR=%%i
 for /f "tokens=2,3 delims=. " %%i in ("%VERSTR%") do (set VERMAJOR=%%i & set VERMINOR=%%j)
 if %VERMAJOR% lss 5 set GIT_VERSION=%GIT_VERSION%-xp
 if %VERMAJOR% equ 5 if %VERMINOR% lss 2 set GIT_VERSION=%GIT_VERSION%-xp
 
 :: Clean up any release which doesn't match the one we want.
-for /d %%i in (%WIN_TOOLS_ROOT_DIR%\git-*_bin) do (
-  if not %%i == %WIN_TOOLS_ROOT_DIR%\git-%GIT_VERSION%_bin (
+for /d %%i in ("%WIN_TOOLS_ROOT_DIR%\git-*_bin") do (
+  if not "%%i" == "%WIN_TOOLS_ROOT_DIR%\git-%GIT_VERSION%_bin" (
     rmdir /s /q "%%i"
   )
 )
 set GIT_BIN_DIR=git-%GIT_VERSION%_bin
 set GIT_ZIP_FILE=%GIT_BIN_DIR%.zip
 set GIT_ZIP_URL=https://commondatastorage.googleapis.com/chrome-infra/%GIT_ZIP_FILE%
 
 if "%WIN_TOOLS_FORCE%" == "1" goto :GIT_INSTALL
 if exist "%WIN_TOOLS_ROOT_DIR%\%GIT_BIN_DIR%\cmd\git.cmd" (
   call "%WIN_TOOLS_ROOT_DIR%\%GIT_BIN_DIR%\cmd\git.cmd" --version 2>nul 1>nul
@@ skipping 81 matching lines @@
 goto :END
 
 
 :returncode
 set WIN_TOOLS_ROOT_URL=
 set WIN_TOOLS_ROOT_DIR=
 exit /b %ERRORLEVEL%
 
 :END
 call :returncode %ERRORLEVEL%