WebView: Assert >= O in AwAutofillProvider

to help avoid confusion, along the lines of
9037d3eeb2ef0f33010f5c37cb5f7908437bdce4.

BUG=767641

Change-Id: I2ebef3380cf3bcc517201b73cf6ca8a7e613f08b
Reviewed-on: https://chromium-review.googlesource.com/679815
Reviewed-by: Bo <boliu@chromium.org>
Commit-Queue: Paul Miller <paulmiller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#503922}
1 file changed