tree def5fed9024c0aef25d7d1f81729b6f0a6687179
parent c84ea8eda5a53229cf1faaed7cb54013b9ea18c3
author Lei Zhang <thestig@chromium.org> 1524171354 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1524171354 +0000

Add public APIs for undo / redo in forms.

Add FORM_CanUndo(), FORM_CanRedo(), FORM_Undo(), and FORM_Redo().

BUG=chromium:764260

Change-Id: I1d9ea67152d9b35d9b8e1d7ef7d019706fdfa30a
Reviewed-on: https://pdfium-review.googlesource.com/30872
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>