Revert sdk 6.1 upgrade changes.

build/internal/essential.scons

 # Copyright (c) 2006-2008 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.
 
 __doc__ = """
 Essential settings for Chromium builds.
 """
 
 Import("env")
 
@@ skipping 28 matching lines @@
           '_WINDOWS',
           ('_HAS_EXCEPTIONS', 0),
           'NOMINMAX',
           '_CRT_RAND_S',
           'CERT_CHAIN_PARA_HAS_EXTRA_FIELDS',
           'WIN32_LEAN_AND_MEAN',
           '_SECURE_ATL',
           ('_HAS_TR1', 0),
       ],
       CPPPATH = [
-          '$PLATFORMSDK_6_1/Include',
+          '$PLATFORMSDK_VISTA/Include',
+          '$PLATFORMSDK_VISTA/VC/INCLUDE',
           '$VISUAL_STUDIO/VC/atlmfc/include',
       ],
       CCFLAGS = [
           '/GR-',   # VCCLCompilerTool.RuntimeTypeInfo="false"
           '/Gs',    # VCCLCompilerTool.BufferSecurityCheck="true"
           '/Gy',    # VCCLCompilerTool.EnableFunctionLevelLinking="true"
           '/W3',    # VCCLCompilerTool.WarningLevel="3"
 
           # TODO(sgk):  re-enable this
           #'/WX',   # WarnAsError="true"
 
           # In the old Visual Studio build, we used /Zi (edit and continue),
           # VCCLComilerTool.DebugInformationFormat="3".
           #
           # /Zi ends up with multiple compiler invocations trying to updat
           # the same vc80.pdb file at the same time, with race conditions
           # and permission problems.  We're using /Z7 because it makes things
           # work even in parallel builds, without special config to avoid
           # multiple simultaneous updates the vc80.pdb file.  All the
           # debugging information and capability still end up in the
           # executables.
           '/Z7',    # VCCLCompilerTool.DebugInformationFormat="1"
 
           # VCCLCompilerTool.DisableSpecificWarnings="4503; 4819"
           '/wd4503',
           '/wd4819',
       ],
       LIBPATH = [
-          '$PLATFORMSDK_6_1/Lib',
+          '$PLATFORMSDK_VISTA/Lib',
+          '$PLATFORMSDK_VISTA/VC/LIB',
           '$VISUAL_STUDIO/VC/atlmfc/lib',
       ],
       LIBS = [
           'msimg32',
           'psapi',
           'usp10.lib',
           'version',
           'wininet',
           'ws2_32',
       ],
@@ skipping 16 matching lines @@
   env.FilterOut(
       CCFLAGS = [
           '/GM',    # VCCLCompilerTool.MinimalRebuild="false"
           '/EH',    # VCCLCompilerTool.ExceptionHandling="0"
       ],
   )
 elif env.Bit('linux'):
   pass
 elif env.Bit('mac'):
   pass