Allows scons build to use local copy of platformsdk if one is not bundled side-by-side.

Review URL: http://codereview.chromium.org/12915

git-svn-id: http://src.chromium.org/svn/trunk/src/build@6305 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

SConscript.main

@@ -261,11 +261,17 @@ else:
 # as our source checkout.
 visual_studio_path = msvs_drive + ':/Program Files/Microsoft Visual Studio 8'
 
+# If side-by-side platform sdk is not available try local copy.
+platform_sdk_path = '$CHROME_SRC_DIR/third_party/platformsdk_vista_6_0/files'
+if (root_env['PLATFORM'] in ['win32', 'cygwin'] and
+    not os.path.exists(windows_env.subst(platform_sdk_path))):
+  platform_sdk_path = (
+      msvs_drive + ':\\Program Files\\Microsoft SDKs\\Windows\\v6.0')
+
 windows_env.Replace(
     CSCRIPT = 'c:\\Windows\\System32\\cscript',
 
-    PLATFORMSDK_VISTA_REL = '../third_party/platformsdk_vista_6_0',
-    PLATFORMSDK_VISTA = '$CHROME_SRC_DIR/third_party/platformsdk_vista_6_0',
+    PLATFORMSDK_VISTA = platform_sdk_path,
     VISUAL_STUDIO = visual_studio_path,
 
     CYGWIN_DIR = windows_env.Dir('$CHROME_SRC_DIR/third_party/cygwin'),

internal/essential.scons

@@ -46,8 +46,8 @@ if env['PLATFORM'] == 'win32':
           ('_HAS_TR1', 0),
       ],
       CPPPATH = [
-          '$PLATFORMSDK_VISTA/files/Include',
-          '$PLATFORMSDK_VISTA/files/VC/INCLUDE',
+          '$PLATFORMSDK_VISTA/Include',
+          '$PLATFORMSDK_VISTA/VC/INCLUDE',
           '$VISUAL_STUDIO/VC/atlmfc/include',
       ],
       CCFLAGS = [
@@ -76,8 +76,8 @@ if env['PLATFORM'] == 'win32':
           '/wd4819',
       ],
       LIBPATH = [
-          '$PLATFORMSDK_VISTA/files/Lib',
-          '$PLATFORMSDK_VISTA/files/VC/LIB',
+          '$PLATFORMSDK_VISTA/Lib',
+          '$PLATFORMSDK_VISTA/VC/LIB',
           '$VISUAL_STUDIO/VC/atlmfc/lib',
       ],
       LIBS = [