tree fa55afb4ec041f2e861ec14e48b85df3dcf92df7
parent 7388470573be4437b0062ec16ba2178bf380790d
author Tom Sepez <tsepez@chromium.org> 1490306099 -0700
committer Chromium commit bot <commit-bot@chromium.org> 1490307324 +0000

Fix CFX_RetainPtr move-assign semantics.

Ensure moved value becomes a nullptr after the move.
Update comment while we're at it.

Change-Id: I7a2999d5f5c5142cc7826cd7880b1e2317b5445f
Reviewed-on: https://pdfium-review.googlesource.com/3163
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>