cc: Don't claim ownership of resources in the pending tree.
DelegatedRendererLayerImpl will claim ownership of resources in a frame,
and this makes unused resources from the previous frame be returned to
the child.
However, this was being done on the pending tree, but the previous frame
was still in the active tree and its resources would be returned early.
Instead, delay telling the ResourceProvider about the frame's resources
until the frame replaces the resources on the active tree.
R=enne, piman@chromium.org
BUG=475894
Review URL: https://codereview.chromium.org/
1087843006
Cr-Commit-Position: refs/heads/master@{#325927}