GitLab

Adds a new method, "GestureProgress" to CastContentWindow::Delegate's
interface which can be used to pass on to the application the
knowledge of an ongoing system gesture.

Bug: internal b/109888887
Test: manual
Change-Id: I4db39537274e16bcb35f84013cc01a71e7c14f3e
Reviewed-on: https://chromium-review.googlesource.com/1093025Reviewed-by: Alex Sakhartchouk <alexst@chromium.org>
Commit-Queue: Ryan Daum <rdaum@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565774}