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I will deprecate deps in proto_library for improved build throughput.
And we can use proto_deps here instead.

Bug: 938011
Change-Id: I406ef84c220536058e3f9e18ccd9ce3e4cb2e45c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1504602
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Ryan Hamilton <rch@chromium.org>
Reviewed-by: Ryan Hamilton <rch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638426}