Create webview wpt builder using emulator

This builder runs on both CI and try server

Bug: 1190323
Change-Id: I058d36ed0fbed4dfa22e9c34a8eefd15b958ba6d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2842491
Commit-Queue: Weizhong Xia <weizhong@google.com>
Reviewed-by: Stephen Martinis <martiniss@chromium.org>
Reviewed-by: Rakib Hasan <rmhasan@google.com>
Cr-Commit-Position: refs/heads/master@{#874828}
GitOrigin-RevId: 613fda488cc6bdb86a6c3c12d5931c782952a323
3 files changed