Enable the ability to run layout tests on Vista as well as XP. See the note ...

webkit/tools/layout_tests/layout_package/platform_utils_win.py

 # Copyright (c) 2006-2009 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 is the Linux implementation of the layout_package.platform_utils
    package. This file should only be imported by that package."""
 
 import path_utils
 import subprocess
 import sys
 
 def PlatformName():
   """Returns the name of the platform we're currently running on."""
   # We're not ready for version-specific results yet. When we uncomment
   # this, we also need to add it to the BaselineSearchPath()
   return 'chromium-win' + PlatformVersion()
 
 def PlatformVersion():
   """Returns the version string for the platform, e.g. '-vista' or
   '-snowleopard'. If the platform does not distinguish between
   minor versions, it returns ''."""
   winver = sys.getwindowsversion()
-  if winver[0] == 5 and (winver[1] == 1 or winver[1] == 2):
+  if winver[0] == 6 and (winver[1] == 0):
+    return '-vista'
+  elif winver[0] == 5 and (winver[1] == 1 or winver[1] == 2):

[darin (slow to review), 2009/09/15 16:23:57]

nit: no need for else after return.  just do "if" instead of "elif"

     return '-xp'
   return ''
 
 def BaselineSearchPath():
   """Returns the list of directories to search for baselines/results, in
   order of preference. Paths are relative to the top of the source tree."""
   dirs = []
+  if PlatformVersion() in ("-vista", "-xp"):
+    dirs.append(path_utils.ChromiumBaselinePath('chromium-win-vista'))
   if PlatformVersion() == "-xp":
     dirs.append(path_utils.ChromiumBaselinePath('chromium-win-xp'))
   dirs.append(path_utils.ChromiumBaselinePath('chromium-win'))
   dirs.append(path_utils.WebKitBaselinePath('win'))
   dirs.append(path_utils.WebKitBaselinePath('mac'))
   return dirs
 
 def WDiffPath():
   """Path to the WDiff executable, whose binary is checked in on Win"""
   return path_utils.PathFromBase('third_party', 'cygwin', 'bin', 'wdiff.exe')
@@ skipping 59 matching lines @@
 
 def _FindBinary(target, binary):
   """On Windows, we look for binaries that we compile in potentially
   two places: src/webkit/$target (preferably, which we get if we
   built using webkit.gyp), or src/chrome/$target (if compiled some other
   way)."""
   try:
     return path_utils.PathFromBase('webkit', target, binary)
   except path_utils.PathNotFound:
     return path_utils.PathFromBase('chrome', target, binary)