GitLab

Note from the comments in cc::Layer that the bounds of root cc::Layers
are specified in pixels, in contrast with those of non-root cc::Layers,
which are specified in DIPs.

Add a compositor_viewport_pixel_size() accessor to RenderWidget to
access this from the sub-class (naming is due the pending renaming of
physical_backing_size to compositor_viewport_pixel_size).

Bug: 814690
Change-Id: Ia8033961e04f18c374123b4f9f8da96be131edc7
Reviewed-on: https://chromium-review.googlesource.com/954359Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: ccameron <ccameron@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541923}