tree 18c88bc620fcded6fc39cdfe3a5b0ae04643424d
parent 566d0b9486f024f253d1c331866b04529c9a22b3
author Dan Sinclair <dsinclair@chromium.org> 1518555303 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1518555303 +0000

Cleanup CXFA_Node ownership

Currently a CXFA_Node can be owned by the CXFA_Document root pointer,
the CXFA_Document Purge list or as a child of another CXFA_Node. This
makes it hard to know who currently owns what.

This CL moves all ownership of nodes into a CXFA_NodeOwner class which
CXFA_Document subclasses. The node owner always owns all nodes and is
responsible for cleaning them up upon destruction. The destruction order
is not guarenteed to be in tree order as nodes can be inserted and moved
around the tree.

Change-Id: I6b202b8e844999ba835093dcdd1a808938b6d9a8
Reviewed-on: https://pdfium-review.googlesource.com/26434
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>