Move DeleteDragDetails to destructor in PipWindowResizer.

Bug: b/127224879
Test: drag-move an Android PIP window - no crash upon finishing drag.
Change-Id: I3d455f3545ea1a7bfba4c9ec6f6b51d3b218078d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1498744
Commit-Queue: Eliot Courtney <edcourtney@chromium.org>
Reviewed-by: Yuichiro Hanada <yhanada@chromium.org>
Cr-Commit-Position: refs/heads/master@{#637606}
2 files changed