Revert of Make GN build match gyp (/bigobj everywhere) and remove now-unnecessary settings

Revert of Make GN build match gyp (/bigobj everywhere) and remove now-unnecessary settings (patchset #1 id:1 of https://codereview.chromium.org/1190813002/)

Reason for revert:
C:\b\build\slave\Win_x64_Builder__dbg_\build\src\content\common\content_message_generator.cc : fatalerror C1128: number of sections exceeded object file format limit : compile with /bigobj

http://build.chromium.org/p/chromium.win/builders/Win%20x64%20Builder%20%28dbg%29/builds/9331/steps/compile/logs/stdio

Original issue's description:
> Make GN build match gyp (/bigobj everywhere) and remove now-unnecessary settings
>
> Previously added to gyp by https://codereview.chromium.org/1188603004.
>
> R=brettw@chromium.org,jam@chromium.org
> BUG=173851
>
> Committed: https://crrev.com/c4d566d2e08b7ec74bba484676a9b408d3866c42
> Cr-Commit-Position: refs/heads/master@{#334734}

TBR=brettw@chromium.org,jam@chromium.org,brucedawson@chromium.org,scottmg@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=173851
Committed: https://crrev.com/5086df227d96512f77e0696d113a4d15a63285bb
Cr-Commit-Position: refs/heads/master@{#334745}

[Marijn Kruisselbrink, 2015-06-16 23:41:01]

Created Revert of Make GN build match gyp (/bigobj everywhere) and remove
now-unnecessary settings

[commit-bot: I haz the power, 2015-06-16 23:41:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1177073007/1

[commit-bot: I haz the power, 2015-06-16 23:42:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-16 23:43:51]

Patchset 1 (id:??) landed as
https://crrev.com/5086df227d96512f77e0696d113a4d15a63285bb
Cr-Commit-Position: refs/heads/master@{#334745}

[scottmg, 2015-06-17 03:39:40]

Thanks for reverting, sorry for the breakage.

I'm not sure what happened, that flag is supposed to be on globally now.