Revert of Reland: Make the CPDFXFA_App non-global

Revert of Reland: Make the CPDFXFA_App non-global (patchset #2 id:20001 of https://codereview.chromium.org/2418653003/ )

Reason for revert:
https://build.chromium.org/p/client.pdfium/builders/linux_xfa_asan_lsan/builds/117/steps/corpus%20tests/logs/stdio

Original issue's description:
> Reland: Make the CPDFXFA_App non-global
> 
> This reverts commit b685e6471075bebd26711bc183de3128f54932e3.
> 
> This CL changes CPDFXFA_App from a global object to a child of the CPDFXFA_Document objects.
> 
> BUG=pdfium:623
> 
> Committed: https://pdfium.googlesource.com/pdfium/+/f3736bca5f874b0889c5906ffbd74a405089f671

TBR=tsepez@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=pdfium:623
Committed: https://pdfium.googlesource.com/pdfium/+/a282c7380f3964de41ea93c9980b12c4513d3473

[dsinclair, 2016-10-13 19:14:16]

The CQ bit was checked by dsinclair@chromium.org

[dsinclair, 2016-10-13 19:14:17]

Created Revert of Reland: Make the CPDFXFA_App non-global

[commit-bot: I haz the power, 2016-10-13 19:14:26]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-13 19:14:37]

Description was changed from

==========
Revert of Reland: Make the CPDFXFA_App non-global (patchset #2 id:20001 of
https://codereview.chromium.org/2418653003/ )

Reason for revert:
https://build.chromium.org/p/client.pdfium/builders/linux_xfa_asan_lsan/build...

Original issue's description:
> Reland: Make the CPDFXFA_App non-global
> 
> This reverts commit b685e6471075bebd26711bc183de3128f54932e3.
> 
> This CL changes CPDFXFA_App from a global object to a child of the
CPDFXFA_Document objects.
> 
> BUG=pdfium:623
> 
> Committed:
https://pdfium.googlesource.com/pdfium/+/f3736bca5f874b0889c5906ffbd74a405089...

TBR=tsepez@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=pdfium:623
==========

to

==========
Revert of Reland: Make the CPDFXFA_App non-global (patchset #2 id:20001 of
https://codereview.chromium.org/2418653003/ )

Reason for revert:
https://build.chromium.org/p/client.pdfium/builders/linux_xfa_asan_lsan/build...

Original issue's description:
> Reland: Make the CPDFXFA_App non-global
> 
> This reverts commit b685e6471075bebd26711bc183de3128f54932e3.
> 
> This CL changes CPDFXFA_App from a global object to a child of the
CPDFXFA_Document objects.
> 
> BUG=pdfium:623
> 
> Committed:
https://pdfium.googlesource.com/pdfium/+/f3736bca5f874b0889c5906ffbd74a405089...

TBR=tsepez@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=pdfium:623

Committed:
https://pdfium.googlesource.com/pdfium/+/a282c7380f3964de41ea93c9980b12c4513d...
==========

[commit-bot: I haz the power, 2016-10-13 19:14:37]

Committed patchset #1 (id:1) as
https://pdfium.googlesource.com/pdfium/+/a282c7380f3964de41ea93c9980b12c4513d...