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  * Unless is_char is true blink will interpret the key event as a raw
    keypress instead of a proper keystroke. Derive and pass through
    this property correctly.

  * Mark the event as EF_IS_SYNTHESIZED and ui::kPropertyFromVK, in
    the same manner that chromeos's virtual keyboard implementation
    does.

Bug: internal b/161811385
Test: manual x86 cast_shell build with wayland_webview_client attached
Change-Id: I4d752bd219eb540a719e0bd339ab674bbbd3db23
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2418999Reviewed-by: Kevin Schoedel <kpschoedel@chromium.org>
Reviewed-by: Daniel Nicoara <dnicoara@chromium.org>
Commit-Queue: Ryan Daum <rdaum@chromium.org>
Cr-Commit-Position: refs/heads/master@{#808906}