Reland of Add PDFium build_overrides

Reland of Add PDFium build_overrides

This reverts commit e43a2442a5e5e1000021caf9f692b69208e1e53c.

This CL adds the build override settings so we can enable XFA in GN builds
in the future.

BUG=chromium:62400
Committed: https://crrev.com/b986e46f8ebf7f0f6b72ad9b6f19a07ea2dde233
Cr-Commit-Position: refs/heads/master@{#391227}

[dsinclair, 2016-05-02 18:45:21]

dsinclair@chromium.org changed reviewers:
+ dpranke@chromium.org

[dsinclair, 2016-05-02 18:45:21]

PTAL.

PDFium change at: https://codereview.chromium.org/1936313002/ I'll update the
DEPS line when that lands.

[Dirk Pranke, 2016-05-02 23:58:59]

lgtm

[dsinclair, 2016-05-03 13:26:37]

The CQ bit was checked by dsinclair@chromium.org

[dsinclair, 2016-05-03 13:26:37]

The patchset sent to the CQ was uploaded after l-g-t-m from dpranke@chromium.org
Link to the patchset: https://codereview.chromium.org/1937273002/#ps20001
(title: "Roll DEPS")

[commit-bot: I haz the power, 2016-05-03 13:26:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1937273002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1937273002/20001

[commit-bot: I haz the power, 2016-05-03 14:34:19]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-05-03 14:35:51]

Description was changed from

==========
Reland of Add PDFium build_overrides

This reverts commit e43a2442a5e5e1000021caf9f692b69208e1e53c.

This CL adds the build override settings so we can enable XFA in GN builds
in the future.

BUG=chromium:62400
==========

to

==========
Reland of Add PDFium build_overrides

This reverts commit e43a2442a5e5e1000021caf9f692b69208e1e53c.

This CL adds the build override settings so we can enable XFA in GN builds
in the future.

BUG=chromium:62400

Committed: https://crrev.com/b986e46f8ebf7f0f6b72ad9b6f19a07ea2dde233
Cr-Commit-Position: refs/heads/master@{#391227}
==========

[commit-bot: I haz the power, 2016-05-03 14:35:51]

Patchset 2 (id:??) landed as
https://crrev.com/b986e46f8ebf7f0f6b72ad9b6f19a07ea2dde233
Cr-Commit-Position: refs/heads/master@{#391227}