tree d84c1d7d06e542eab473cc8e855be19618132a61
parent c68109a2dac3be544b7753d1fd677255d859745b
author Tom Sepez <tsepez@chromium.org> 1532121157 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1532121157 +0000

Replace downcasts in cxfa_node to checked conversion methods.

Part of the effort to not trust downcasts in the CFXA_Node hierarchy.
The number of subclasses is small enough here that the O(n^2) space
overhead for the vtables is not significant.

Put all sub-classes in same top-level namespace as the parent, just
because we avoid jumping in and out of anonymous namespace.

Change-Id: I32b80a93c75f8a09eb17c01fe1e29d04b4053fa1
Reviewed-on: https://pdfium-review.googlesource.com/38510
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>