Allow RemoteContextHelper to open windows from remote contexts (#48159)
There will be multiple tests in followup CLs that will need to open
windows from existing windows and frames. This will allow to simplify those tests.
Example usage: https://crrev.com/c/5841474
Bug: 340606651
Bug: b/365144247
Change-Id: I47f4d8c473fe69bc72e2c9345c0d5825451431e4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5838815
Commit-Queue: Ari Chivukula arichiv@chromium.org
Reviewed-by: Fergal Daly fergal@chromium.org
Reviewed-by: Ari Chivukula arichiv@chromium.org
Cr-Commit-Position: refs/heads/main@{#1355331}
Co-authored-by: Sandor Major sandormajor@google.com