GitLab

We clamp raster scale during animation by the device viewport size, so
we need to force raster scale update on device viewport rect change.

This is expecially important for remote frames which have zero device
viewport size initially, and the size is the frame size instead of the
actual device viewport. This happens in the testing frame on codepen
etc.

Also limit the minimum viewport geometry to avoid too small scale in
small remote frames.

Bug: 1164960
Change-Id: Idb1cfeb878fde76252a467bf8aca8c97ef506c6e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2623720Reviewed-by: vmpstr <vmpstr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842710}