Revert of Get gn_all/gyp_remaining working for Windows.

Revert of Get gn_all/gyp_remaining working for Windows. (patchset #2 id:20001 of https://codereview.chromium.org/1064333002/)

Reason for revert:
Seems to have broken the Win x64 debug builder:

http://build.chromium.org/p/chromium.win/builders/Win%20x64%20Builder%20(dbg)/builds/7600

Original issue's description:
> Get gn_all/gyp_remaining working for Windows.
>
> This change doesn't actually cause anything new to be built, but it makes 'gn_all' and 'gyp_remaining' exist as targets on a windows build, and explicitly lists all of the targets built on win that weren't listed before.
>
> A number of these targets should actually build in a GN build, but I will take care of that in a follow-up CL.
>
> R=brettw@chromium.org
> BUG=354261
> CQ_EXTRA_TRYBOTS=tryserver.chromium.linux:android_chromium_gn_compile_dbg,android_chromium_gn_compile_rel;tryserver.chromium.win:win8_chromium_gn_rel,win8_chromium_gn_dbg;tryserver.chromium.mac:mac_chromium_gn_rel,mac_chromium_gn_dbg
>
> Committed: https://crrev.com/eaef8f504d6e2a55626e2fb8b6c233f1d756d65c
> Cr-Commit-Position: refs/heads/master@{#324285}

TBR=brettw@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=354261
Committed: https://crrev.com/2fbb13254941a8a0c33695cbfde0389c53828e3b
Cr-Commit-Position: refs/heads/master@{#324291}

[Dirk Pranke, 2015-04-08 22:07:11]

Created Revert of Get gn_all/gyp_remaining working for Windows.

[commit-bot: I haz the power, 2015-04-08 22:09:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1071603005/1

[commit-bot: I haz the power, 2015-04-08 22:12:09]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-08 22:13:11]

Patchset 1 (id:??) landed as
https://crrev.com/2fbb13254941a8a0c33695cbfde0389c53828e3b
Cr-Commit-Position: refs/heads/master@{#324291}