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So recevier doesn't need to get stream info from side channel. And the
delegate of the receiver can directly get the stream info from receiver.

Merge-With: eureka-internal/408117
Bug: internal: 154953397
Test: Unittest.
Change-Id: I5915b297cb3f252b7493b36719670f842a5d8c95
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2352216Reviewed-by: Kenneth MacKay <kmackay@chromium.org>
Commit-Queue: Kehuang Li <kehuangli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#805513}