Rewrite chrome-update.py and .bat....

chrome-update.bat

Index: chrome-update.bat
===================================================================
--- chrome-update.bat	(revision 32063)
+++ chrome-update.bat	(working copy)
@@ -1,34 +1,5 @@
 @echo off
-
-:: This batch file assumes that the correct version of python can be found in
-:: the current directory, and that you have Visual Studio 8 installed in the
-:: default location. It will try to find Visual Studio in the default
-:: installation paths for x86 and x64 versions of windows as well as through
-:: the PATH environment variable.
-
 setlocal
-IF EXIST "%ProgramFiles(x86)%\Microsoft Visual Studio 8\VC\bin\vcvars32.bat" (
-  CALL "%ProgramFiles(x86)%\Microsoft Visual Studio 8\VC\bin\vcvars32.bat"
-) ELSE IF EXIST "%ProgramFiles%\Microsoft Visual Studio 8\VC\bin\vcvars32.bat" (
-  CALL "%ProgramFiles%\Microsoft Visual Studio 8\VC\bin\vcvars32.bat"
-) ELSE (
-  :: See "HELP CALL" for information on how to use %~$PATH:1 to find a file in
-  :: the PATH.
-  CALL :FIND_IN_PATH "vcvars32.bat"
-)
-
-:: If vcvasr32.bat cannot be found or there was a problem, stop execution.
-IF %ERRORLEVEL%==1 GOTO :EOF
-python "%~dp0chrome-update.py" %*
-GOTO :EOF
-
-:FIND_IN_PATH
-  :: %~$PATH:1 works like "which" on linux; use it to see if the file exists and
-  :: call it if found. If it cannot be found print an error and set errorlevel
-  IF EXIST "%~$PATH:1" (
-    CALL "%~$PATH:1"
-  ) ELSE (
-    ECHO Cannot find vcvars32.bat! (Do you have Visual Studio in your PATH?)
-    SET ERRORLEVEL=1
-  )
-  GOTO :EOF
+:: This is required with cygwin only.
+PATH=%~dp0;%PATH%
+call python "%~dp0chrome-update.py" %*