[chromecast] Add chromecast mojo typemaps

Bug: b/124400932
Merge-With: eureka-internal/243261
Test: None
Change-Id: I5dcc1a34577874ca8927db394b7d84567cf234db
Reviewed-on: https://chromium-review.googlesource.com/c/1472250
Reviewed-by: Luke Halliwell <halliwell@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Junbo Ke <juke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#633978}
3 files changed