Since build 8235, cronet tests are failing in step cronet_test_instrumentation_apk:

C  244.662s Main  [  FAILED  ] 4 tests, listed below:
C  244.662s Main  [  FAILED  ] org.chromium.net.urlconnection.CronetChunkedOutputStreamTest#testGetResponseAfterWriteFailed
C  244.662s Main  [  FAILED  ] org.chromium.net.urlconnection.CronetChunkedOutputStreamTest#testWriteAfterRequestFailed
C  244.662s Main  [  FAILED  ] org.chromium.net.urlconnection.CronetFixedModeOutputStreamTest#testGetResponseAfterWriteFailed
C  244.662s Main  [  FAILED  ] org.chromium.net.urlconnection.CronetFixedModeOutputStreamTest#testWriteAfterRequestFailed

Builder: https://ci.chromium.org/buildbot/chromium.android/Android%20Cronet%20Builder%20%28dbg%29/
First failing build: https://ci.chromium.org/buildbot/chromium.android/Android%20Cronet%20Builder%20%28dbg%29/8235