tree a2d208713a2fc14e8e0833ee0b08c572591cff48
parent b2ef0750b791cece4d8f10cbac7b5985a3767161
author Tom Sepez <tsepez@chromium.org> 1599850165 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1599850165 +0000

Make CFXA_FMSimpleExpression a subclass of CFXA_FMExpression.

Having a tree with two distinct base classes seems dubious.

-- add const along the way
-- move some constructor implementations to .cpp file.

Change-Id: I37caf46569a857048a745bf00092e946e710c0ee
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/73570
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>