Relax a couple checks to allow certain non-standard PDF files.

Relax a couple checks to allow certain non-standard PDF files.

Some non-standard PDF files misuse the size of cross reference table,
and reuse some object number which the old one is still in use. PDFium
can relax the reusing of xref objects only since it is not referred in
the pdf document. When the size of cross reference table is larger
than defined, PDFium will try to continue other than abort.

BUG=chromium:596947
Committed: https://pdfium.googlesource.com/pdfium/+/cd1e9ff4f432cbc29ed279e6891fb7ddc2ea3734

[Wei Li, 2016-04-27 17:57:02]

weili@chromium.org changed reviewers:
+ dsinclair@chromium.org, thestig@chromium.org

[Wei Li, 2016-04-27 17:57:02]

for review, thanks

[dsinclair, 2016-04-27 18:21:03]

lgtm

[Wei Li, 2016-04-29 17:11:08]

The CQ bit was checked by weili@chromium.org

[commit-bot: I haz the power, 2016-04-29 17:11:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1926823002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1926823002/1

[commit-bot: I haz the power, 2016-04-29 17:24:05]

Description was changed from

==========
Relax a couple checks to allow certain non-standard PDF files.

Some non-standard PDF files misuse the size of cross reference table,
and reuse some object number which the old one is still in use. PDFium
can relax the reusing of xref objects only since it is not referred in
the pdf document. When the size of cross reference table is larger
than defined, PDFium will try to continue other than abort.

BUG=chromium:596947
==========

to

==========
Relax a couple checks to allow certain non-standard PDF files.

Some non-standard PDF files misuse the size of cross reference table,
and reuse some object number which the old one is still in use. PDFium
can relax the reusing of xref objects only since it is not referred in
the pdf document. When the size of cross reference table is larger
than defined, PDFium will try to continue other than abort.

BUG=chromium:596947

Committed:
https://pdfium.googlesource.com/pdfium/+/cd1e9ff4f432cbc29ed279e6891fb7ddc2ea...
==========

[commit-bot: I haz the power, 2016-04-29 17:24:05]

Committed patchset #1 (id:1) as
https://pdfium.googlesource.com/pdfium/+/cd1e9ff4f432cbc29ed279e6891fb7ddc2ea...

[Wei Li, 2016-05-03 18:32:48]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1946693002/ by weili@chromium.org.

The reason for reverting is: Speculatively revert due to high volume of crashes
on Chromium..