Revert of Add PDFium build_overrides

Revert of Add PDFium build_overrides (patchset #5 id:100001 of https://codereview.chromium.org/1923343002/ )

Reason for revert:
Broke fuzzer bots.

Original issue's description:
> Add PDFium build_overrides
>
> This CL adds the build override settings so we can enable XFA in GN builds
> in the future.
>
> BUG=chromium:62400
TBR=thakis@chromium.org,tsepez@chromium.org,thestig@chromium.org,dpranke@chromium.org,aizatsky@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:62400
Committed: https://crrev.com/e43a2442a5e5e1000021caf9f692b69208e1e53c
Cr-Commit-Position: refs/heads/master@{#390577}

[dsinclair, 2016-04-29 02:25:05]

Created Revert of Add PDFium build_overrides

[commit-bot: I haz the power, 2016-04-29 02:25:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1933583002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1933583002/1

[commit-bot: I haz the power, 2016-04-29 02:25:42]

Committed patchset #1 (id:1)

[Dirk Pranke, 2016-04-29 02:27:34]

lgtm

[commit-bot: I haz the power, 2016-04-30 17:23:54]

Patchset 1 (id:??) landed as
https://crrev.com/e43a2442a5e5e1000021caf9f692b69208e1e53c
Cr-Commit-Position: refs/heads/master@{#390577}

[commit-bot: I haz the power, 2016-04-30 17:59:08]

Description was changed from

==========
Revert of Add PDFium build_overrides (patchset #5 id:100001 of
https://codereview.chromium.org/1923343002/ )

Reason for revert:
Broke fuzzer bots.

Original issue's description:
> Add PDFium build_overrides
> 
> This CL adds the build override settings so we can enable XFA in GN builds
> in the future.
> 
> BUG=chromium:62400

TBR=thakis@chromium.org,tsepez@chromium.org,thestig@chromium.org,dpranke@chro...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:62400
==========

to

==========
Revert of Add PDFium build_overrides (patchset #5 id:100001 of
https://codereview.chromium.org/1923343002/ )

Reason for revert:
Broke fuzzer bots.

Original issue's description:
> Add PDFium build_overrides
>
> This CL adds the build override settings so we can enable XFA in GN builds
> in the future.
>
> BUG=chromium:62400

TBR=thakis@chromium.org,tsepez@chromium.org,thestig@chromium.org,dpranke@chro...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:62400

Committed: https://crrev.com/e43a2442a5e5e1000021caf9f692b69208e1e53c
Cr-Commit-Position: refs/heads/master@{#390577}
==========