osr: Test PDF viewer behavior with MPArch GuestView (M132+)

chromiumembedded / cef

Chromium Embedded Framework (CEF). A simple framework for embedding Chromium-based browsers in other applications.

https://bitbucket.org/chromiumembedded/cef/

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osr: Test PDF viewer behavior with MPArch GuestView (M132+) #3833

Open magreenblatt opened 1 week ago

magreenblatt commented 1 week ago

Chromium is changing the implementation of GuestViews (e.g. MimeHandlerView for the PDF viewer) to use MPArch inner pages instead of the current inner WebContents. In M132 this is default disabled but testable with --enable-features=GuestViewMPArch. It's currently unclear if/how this will work with off-screen rendering in CEF. See https://issues.chromium.org/issues/40202416 for background.