Drop dependency to Chromium in WebRtcJniBootTest.

The dependency breaks a build downstream.

BUG=None

Review-Url: https://codereview.webrtc.org/2630713002
Cr-Original-Commit-Position: refs/heads/master@{#16047}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: c5da08fc12faa862fbf0c34181332c32dae458a3
1 file changed