Disable input scaling only when an input came from renderer

I didn't realized that touch events are directly sent to guest views. This fixes the issue by only skip scaling when events are sent back from renderer.

BUG=485650, 600453
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation

Review-Url: https://codereview.chromium.org/1977513002
Cr-Commit-Position: refs/heads/master@{#394499}
3 files changed