Fix WebRTC fuzzers tests in Chromium.
Fix WebRTC fuzzers tests in Chromium.

When WebRTC fuzzers tests are built on Chromium bots they need to link
with Chromium's implementation of metrics.

TBR=phoglund@webrtc.org

Bug: webrtc:9631
Change-Id: I1c955e646366b6b37d3ca595888e8cc94fe1b00e
Reviewed-on: https://webrtc-review.googlesource.com/100940
Commit-Queue: Mirko Bonadei <d2c43c210eae6feef04f53bae50885e8152edcca@webrtc.org>
Reviewed-by: Christian Fremerey <c19eb80f0993c83392e66743f8bb19e5e76db01d@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#24771}
ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc