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This also removes the virtual test suite, and the failing test
expectations from the experimental build.

The default values for the two initial features are also set to their
correct web-compatible defaults.

Bug: 993790
Change-Id: I308676b0c63524ad4a229a03940b928f95a384c9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2019464
Commit-Queue: Ian Clelland <iclelland@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735751}