GitLab

Put new implementation of ResizeObserver::observe behind
ResizeObserverUpdates flag to prevent compat issues until the final
version of Resize Observer is shipped. No JavaScript error shold
be thrown when unsupported second argument is passed to
ResizeObserver::observe(). Issue was introduced in the
following CL: http://crrev.com/c/2004051

Bug: 1056535
Change-Id: I7e6d319d14f9d318e0f68ea3e056cfa27eb7f937
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2077280
Commit-Queue: Sahir Vellani <sahir.vellani@microsoft.com>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Reviewed-by: Daniel Libby <dlibby@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#750235}