GitLab

- Add a new parameter default_local_memory in
InstantiatePersistentHistograms()
- Set it true for WebView.
- Plan to merge this patch to M86.

Bug: 1090682
Change-Id: I218c9960c9cb72e184e36f78e97096a8f6691759
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2411706
Commit-Queue: Michael Bai <michaelbai@chromium.org>
Reviewed-by: Brian White <bcwhite@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807583}