Revert of Work on Windows GN component build.

Revert of Work on Windows GN component build. (patchset #8 id:140001 of https://codereview.chromium.org/1053203003/)

Reason for revert:
Reverting the CL because I think that it broke the GN compile on Linux - See http://build.chromium.org/p/chromium.linux/builders/Linux%20GN/builds/26255/steps/compile/logs/stdio

Original issue's description:
> Work on Windows GN component build.
>
> This makes ppapi_shared link. This required many changes to gpu to match the structure of GYP in both component and non-component modes.
>
> BUG=470212
> 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/b3c7880dc9e66ff449b23e2273b4f20abecba442
> Cr-Commit-Position: refs/heads/master@{#323937}

TBR=dpranke@chromium.org,brettw@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=470212
Committed: https://crrev.com/59639a8ae80d96e4083be7a19865de32bbf798bc
Cr-Commit-Position: refs/heads/master@{#323942}

[pkotwicz, 2015-04-06 20:34:38]

Created Revert of Work on Windows GN component build.

[commit-bot: I haz the power, 2015-04-06 20:35:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1057993004/1

[commit-bot: I haz the power, 2015-04-06 20:36:25]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-06 20:37:20]

Patchset 1 (id:??) landed as
https://crrev.com/59639a8ae80d96e4083be7a19865de32bbf798bc
Cr-Commit-Position: refs/heads/master@{#323942}