GitLab

There should only be one mojom::GpuService message pipe so
GpuServiceImpl only needs one receiver instead of a set of them.

Bug: none
Change-Id: I76737d92dfcd4af84120709f4a25497ca34ab9e5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1869396Reviewed-by: Jonathan Ross <jonross@chromium.org>
Commit-Queue: kylechar <kylechar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#707452}