Reload PDF in DevTools should reload the embedder, not the guest.

When a page reload is initiated from the DevTools window, it issues a
reload request for the WebContents it is associated with. But for a PDF
this is incorrect, it should reload the embedder page instead.

Bug: 510328
Change-Id: I5d7b270e5a5c26c7d2063e982f6dd28187398656
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1659983
Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
Reviewed-by: Ehsan Karamad <ekaramad@chromium.org>
Commit-Queue: James MacLean <wjmaclean@chromium.org>
Cr-Commit-Position: refs/heads/master@{#670071}
2 files changed