Fix SCons modules build on Windows:...

Fix SCons modules build on Windows:
* Add 'midl' Tool module.
* Filter out the default OS_WINDOWS= definition from the Hammer
  modules, which messes up our build.
* Fix the $PLATFORMSDK_VISTA definition.
* Remove the current directory from the 'base' Alias (avoid cycles).
* Remove by-hand addition of .lib, .pdb and .ilk files to the target
  list when build shared libraries (multiple places).
* Comment out a post-action Touch() of the themes/default resource.
(Thanks to bradnelson for many of the above individual fixes.)

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=3980

[bradn, 2008-10-25 17:12:13]

LGTM

[tony, 2008-10-26 03:10:28]

LGTM2