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This CL fixes a problem where the last committed origin of
RenderFrameHost was never set after document.write cancels an initial
navigation in a subframe or in a popup.

In addition to running the new regression tests, I also manually tested
that the repro steps from https://crbug.com/932067 no longer hit the bug
- in particular, the console output included both "onupgradeneeded" and
"onsuccess".

Bug: 932067
Change-Id: If1f031b988005e498a3515abe3137680db35ea0e
Reviewed-on: https://chromium-review.googlesource.com/c/1480670Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Reviewed-by: Charlie Reis <creis@chromium.org>
Commit-Queue: Łukasz Anforowicz <lukasza@chromium.org>
Cr-Commit-Position: refs/heads/master@{#635181}