anchor.diff:  IF "%DEPOT_TOOLS_UPDATE%" == "0" GOTO :EOF
   
   :: We need either .\.svn\. or .\.git\. to be able to sync.
  -IF EXIST "%~dp0.svn\." GOTO :SVN_UPDATE
  -IF EXIST "%~dp0.git\." GOTO :GIT_UPDATE
  +IF EXIST "%DEPOT_TOOLS_DIR%.svn\." GOTO :SVN_UPDATE
  +IF EXIST "%DEPOT_TOOLS_DIR%.git\." GOTO :GIT_UPDATE
   echo Error updating depot_tools, no revision tool found.
   goto :EOF
   
   
   :SVN_UPDATE
  -call svn up -q "%~dp0."
  +call svn up -q "%DEPOT_TOOLS_DIR%."
   goto :EOF
   
   
   :GIT_UPDATE
  -cd /d "%~dp0."
  +cd /d "%DEPOT_TOOLS_DIR%."
   call git config remote.origin.fetch > NUL
   if errorlevel 1 goto :GIT_SVN_UPDATE
   for /F %%x in ('git config --get remote.origin.url') DO (
  
positive.code: goto :EOF
  
  :GIT_SVN_UPDATE
  cd /d "%~dp0."
  call git svn rebase -q -q
  goto :EOF
  
negative.code: 
  setlocal
  
  :: Windows freaks out if a file is overwritten while it's being executed.  Copy
  :: this script off to a temporary location and reinvoke from there before
  :: running any svn or git commands.
  IF %~nx0==update_depot_tools.bat (
    COPY /Y %~dp0update_depot_tools.bat %TEMP%\update_depot_tools_tmp.bat >nul
    if errorlevel 1 goto :EOF
    %TEMP%\update_depot_tools_tmp.bat %~dp0 %*
  )
  
  set DEPOT_TOOLS_DIR=%1
  SHIFT
  
  set GIT_URL=https://chromium.googlesource.com/chromium/tools/depot_tools.git
  
  :: 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 will be installed only if
  :: not already in the PATH environment variable.
  call "%DEPOT_TOOLS_DIR%bootstrap\win\win_tools.bat" force
  if errorlevel 1 goto :EOF
  :: Now clear errorlevel so it can be set by other programs later.
  set errorlevel=
  