GitLab

No change to logic. This moves WebView's variations code into separate
folders with distinct OWNERS files, updates BUILD rules, and applies
automatic code formatting from git-cl format.

Test: autoninja -C out/Default system_webview_apk
Test: run_webview_instrumentation_test_apk -f *Variations*
Test: gn check out/Default android_webview/browser/variations:variations
Test: gn check out/Default android_webview/browser:browser
Change-Id: If405f2f840d37861d38f8d5b221ed5f2bc36de69
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2469356Reviewed-by: Richard Coles <torne@chromium.org>
Reviewed-by: Changwan Ryu <changwan@chromium.org>
Commit-Queue: Nate Fischer <ntfschr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#817130}