Create dynamic resource for GTS RecyclerView

The GridTabSwitcher RecyclerView would be rendered to a Bitmap
as the background in TabListSceneLayer, so that the shrinking Tab
can be animated on top of the (Bitmap version of) GTS RecyclerView.

Bug: 964406
Change-Id: I9962cbcce42ad7787e170a2fd855375a318cf324
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1617892
Commit-Queue: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Reviewed-by: Yusuf Ozuysal <yusufo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#662498}
7 files changed