chromecast: Add override for IsDataResourceGzipped() in CastContentClient

This fixes a regression where settings can't be opened on Estelle.

Bug: b/132257001
Test: open settings on estelle

Change-Id: I4699de0b07b20e52632fcc72f564cd0e0638de66
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1600327
Auto-Submit: Michael Spang <spang@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Michael Spang <spang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#657791}
2 files changed