Propagate filename and filepath to PdfPage constructor

When pdf page is frozen or moved to another window, we need to recreate
the PdfPage while avoid re-download.
Get the filename and filepath from the previous native page and use that
to construct the PdfPage.

Bug: 330086336
Change-Id: I2ff787c0f91517c9d96bf6fcee644fa08c4a06c0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5386785


Reviewed-by: Theresa Sullivan <twellington@chromium.org>
Reviewed-by: Min Qin <qinmin@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Auto-Submit: Shu Yang <shuyng@google.com>
Commit-Queue: Ted Choc <tedchoc@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1277165}