M55: Fixup formfiller cleanup

M55: Fixup formfiller cleanup

The CFFL_InteractiveFormFiller must be cleaned up before the environment because
the destruction of the formfiller will trigger the destruction of the formfiller
widgets. Some of those widgets may require stopping timers, which requires
accessing the environment.

BUG=chromium:654272, chromium:653459
TBR=tsepez@chromium.org

Review-Url: https://codereview.chromium.org/2408163003
(cherry picked from commit 709f5a9301e91365ab87610993c497e386504ead)

Committed: https://pdfium.googlesource.com/pdfium/+/d586fe81bc2ec6785fa6d34df73fc564d48a2866

[Lei Zhang, 2016-10-24 20:42:20]

Description was changed from

==========
M55: Fixup formfiller cleanup

The CFFL_InteractiveFormFiller must be cleaned up before the environment because
the destruction of the formfiller will trigger the destruction of the formfiller
widgets. Some of those widgets may require stopping timers, which requires
accessing the environment.

BUG=chromium:654272, chromium:653459
TBR=tsepez@chromium.org

Review-Url: https://codereview.chromium.org/2408163003
(cherry picked from commit 709f5a9301e91365ab87610993c497e386504ead)
==========

to

==========
M55: Fixup formfiller cleanup

The CFFL_InteractiveFormFiller must be cleaned up before the environment because
the destruction of the formfiller will trigger the destruction of the formfiller
widgets. Some of those widgets may require stopping timers, which requires
accessing the environment.

BUG=chromium:654272, chromium:653459
TBR=tsepez@chromium.org

Review-Url: https://codereview.chromium.org/2408163003
(cherry picked from commit 709f5a9301e91365ab87610993c497e386504ead)

Committed:
https://pdfium.googlesource.com/pdfium/+/d586fe81bc2ec6785fa6d34df73fc564d48a...
==========

[Lei Zhang, 2016-10-24 20:42:21]

Committed patchset #1 (id:1) manually as
d586fe81bc2ec6785fa6d34df73fc564d48a2866 (presubmit successful).

[Lei Zhang, 2016-10-24 20:43:35]

TBR