Run:
./components/cronet/tools/cr_cronet.py gn --out_dir=out/Cronet
ninja -C out/Cronet cronet_smoketests_platform_only_instrumentation_apk

Expected:
Build completes with no additional output.

Actual:
[875/880] ACTION //components/cronet/android:cronet_smoketests_p...apk__apk__final_dex(//build/toolchain/android:android_clang_arm) 
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/channel/sctp/nio/NioSctpChannel.class:                    
  Type `com.sun.nio.sctp.MessageInfo` was not found, it is required for default or static interface methods desugaring of `boolean i
o.netty.channel.sctp.nio.NioSctpChannel.doWriteMessage(java.lang.Object, io.netty.channel.ChannelOutboundBuffer)`                  
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/channel/udt/nio/NioUdtByteConnectorChannel$2.class:       
  Type `com.barchart.udt.StatusUDT` was not found, it is required for default or static interface methods desugaring of `void io.net
ty.channel.udt.nio.NioUdtByteConnectorChannel$2.<clinit>()`                                                                         
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/channel/udt/nio/NioUdtProvider$1.class:                   
  Type `com.barchart.udt.nio.KindUDT` was not found, it is required for default or static interface methods desugaring of `void io.n
etty.channel.udt.nio.NioUdtProvider$1.<clinit>()`                                                                                   
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/channel/udt/nio/NioUdtProvider$1.class:                   
  Type `com.barchart.udt.TypeUDT` was not found, it is required for default or static interface methods desugaring of `void io.netty
.channel.udt.nio.NioUdtProvider$1.<clinit>()`                                                                                       
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/codec/compression/LzfEncoder.class:               
  Type `com.ning.compress.lzf.LZFEncoder` was not found, it is required for default or static interface methods desugaring of `void 
io.netty.handler.codec.compression.LzfEncoder.encode(io.netty.channel.ChannelHandlerContext, io.netty.buffer.ByteBuf, io.netty.buffe
r.ByteBuf)`                                                                                                                         
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/codec/protobuf/ProtobufEncoderNano.class:         
  Type `com.google.protobuf.nano.CodedOutputByteBufferNano` was not found, it is required for default or static interface methods de
sugaring of `void io.netty.handler.codec.protobuf.ProtobufEncoderNano.encode(io.netty.channel.ChannelHandlerContext, com.google.prot
obuf.nano.MessageNano, java.util.List)`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/codec/protobuf/ProtobufDecoderNano.class:         
  Type `com.google.protobuf.nano.MessageNano` was not found, it is required for default or static interface methods desugaring of `v
oid io.netty.handler.codec.protobuf.ProtobufDecoderNano.decode(io.netty.channel.ChannelHandlerContext, io.netty.buffer.ByteBuf, java
.util.List)`                                                                                                                        
Warning in lib.java/third_party/junit/junit.jar:org/junit/internal/runners/statements/FailOnTimeout.class:
  Type `java.lang.management.ManagementFactory` was not found, it is required for default or static interface methods desugaring of
`long org.junit.internal.runners.statements.FailOnTimeout.cpuTime(java.lang.Thread)`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/channel/sctp/nio/NioSctpChannel.class:
  Type `com.sun.nio.sctp.SctpChannel` was not found, it is required for default or static interface methods desugaring of `com.sun.n
io.sctp.SctpChannel io.netty.channel.sctp.nio.NioSctpChannel.newSctpChannel()`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/channel/sctp/nio/NioSctpServerChannel.class:
  Type `com.sun.nio.sctp.SctpServerChannel` was not found, it is required for default or static interface methods desugaring of `com
.sun.nio.sctp.SctpServerChannel io.netty.channel.sctp.nio.NioSctpServerChannel.newSocket()`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/channel/udt/nio/NioUdtProvider.class:
  Type `com.barchart.udt.nio.SelectorProviderUDT` was not found, it is required for default or static interface methods desugaring o
f `com.barchart.udt.nio.ServerSocketChannelUDT io.netty.channel.udt.nio.NioUdtProvider.newAcceptorChannelUDT(com.barchart.udt.TypeUD
T)`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/ssl/JdkAlpnSslEngine.class:
  Type `org.eclipse.jetty.alpn.ALPN` was not found, it is required for default or static interface methods desugaring of `void io.ne
tty.handler.ssl.JdkAlpnSslEngine.closeInbound()`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/ssl/JdkNpnSslEngine.class:
  Type `org.eclipse.jetty.npn.NextProtoNego` was not found, it is required for default or static interface methods desugaring of `vo
id io.netty.handler.ssl.JdkNpnSslEngine.closeOutbound()`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/util/internal/logging/CommonsLoggerFactory.class:
  Type `org.apache.commons.logging.LogFactory` was not found, it is required for default or static interface methods desugaring of `
io.netty.util.internal.logging.InternalLogger io.netty.util.internal.logging.CommonsLoggerFactory.newInstance(java.lang.String)`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/util/internal/logging/Log4J2LoggerFactory.class:
  Type `org.apache.logging.log4j.LogManager` was not found, it is required for default or static interface methods desugaring of `io
.netty.util.internal.logging.InternalLogger io.netty.util.internal.logging.Log4J2LoggerFactory.newInstance(java.lang.String)`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/util/internal/logging/Slf4JLoggerFactory.class:
  Type `org.slf4j.LoggerFactory` was not found, it is required for default or static interface methods desugaring of `io.netty.util.
internal.logging.InternalLogger io.netty.util.internal.logging.Slf4JLoggerFactory.newInstance(java.lang.String)`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/codec/compression/LzfDecoder.class:
  Type `com.ning.compress.lzf.util.ChunkDecoderFactory` was not found, it is required for default or static interface methods desuga
ring of `void io.netty.handler.codec.compression.LzfDecoder.<init>(boolean)`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/codec/compression/LzfDecoder.class:
  Type `com.ning.compress.BufferRecycler` was not found, it is required for default or static interface methods desugaring of `void
io.netty.handler.codec.compression.LzfDecoder.<init>(boolean)`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/util/internal/logging/Log4JLoggerFactory.class:
  Type `org.apache.log4j.Logger` was not found, it is required for default or static interface methods desugaring of `io.netty.util.
internal.logging.InternalLogger io.netty.util.internal.logging.Log4JLoggerFactory.newInstance(java.lang.String)`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/codec/compression/LzfEncoder.class:
  Type `com.ning.compress.lzf.util.ChunkEncoderFactory` was not found, it is required for default or static interface methods desuga
ring of `void io.netty.handler.codec.compression.LzfEncoder.<init>(boolean, int)`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/channel/rxtx/RxtxChannel.class:
  Type `gnu.io.CommPortIdentifier` was not found, it is required for default or static interface methods desugaring of `void io.nett
y.channel.rxtx.RxtxChannel.doConnect(java.net.SocketAddress, java.net.SocketAddress)`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/codec/compression/Lz4FrameDecoder.class:
  Type `net.jpountz.xxhash.XXHashFactory` was not found, it is required for default or static interface methods desugaring of `void
io.netty.handler.codec.compression.Lz4FrameDecoder.<init>(net.jpountz.lz4.LZ4Factory, boolean)`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/codec/compression/Lz4FrameDecoder.class:
  Type `net.jpountz.lz4.LZ4Factory` was not found, it is required for default or static interface methods desugaring of `void io.net
ty.handler.codec.compression.Lz4FrameDecoder.<init>(boolean)`
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/ssl/JdkNpnSslEngine$1.class:
  Interface `org.eclipse.jetty.npn.NextProtoNego$ServerProvider` not found. It's needed to make sure desugaring of `io.netty.handler
.ssl.JdkNpnSslEngine$1` is correct. Desugaring will assume that this interface has no default method.
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/ssl/JdkAlpnSslEngine$1.class:
  Interface `org.eclipse.jetty.alpn.ALPN$ServerProvider` not found. It's needed to make sure desugaring of `io.netty.handler.ssl.Jdk
AlpnSslEngine$1` is correct. Desugaring will assume that this interface has no default method.
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/ssl/JdkAlpnSslEngine$2.class:
  Interface `org.eclipse.jetty.alpn.ALPN$ClientProvider` not found. It's needed to make sure desugaring of `io.netty.handler.ssl.Jdk
AlpnSslEngine$2` is correct. Desugaring will assume that this interface has no default method.
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/ssl/JdkNpnSslEngine$2.class:
  Interface `org.eclipse.jetty.npn.NextProtoNego$ClientProvider` not found. It's needed to make sure desugaring of `io.netty.handler
.ssl.JdkNpnSslEngine$2` is correct. Desugaring will assume that this interface has no default method.
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/codec/marshalling/ChannelBufferByteOutput.class:
  Interface `org.jboss.marshalling.ByteOutput` not found. It's needed to make sure desugaring of `io.netty.handler.codec.marshalling
.ChannelBufferByteOutput` is correct. Desugaring will assume that this interface has no default method.
Warning in lib.java/third_party/netty4/netty-all-4.1.9.Final.jar:io/netty/handler/codec/marshalling/ChannelBufferByteInput.class:
  Interface `org.jboss.marshalling.ByteInput` not found. It's needed to make sure desugaring of `io.netty.handler.codec.marshalling.
ChannelBufferByteInput` is correct. Desugaring will assume that this interface has no default method.
Warning in lib.java/third_party/android_deps/com_android_support_support_compat_java.jar:android/support/v4/util/ArrayMap$1.class:
  Invalid signature 'Landroid/support/v4/util/MapCollections<TK;TV;>.EntrySet;' for field android.support.v4.util.MapCollections$Ent
rySet android.support.v4.util.ArrayMap$1.mEntrySet.
Signature is ignored and will not be present in the output.
Parser error: Unknown error parsing field signature: String index out of range: -30
Warning in lib.java/third_party/android_deps/com_android_support_support_compat_java.jar:android/support/v4/util/ArrayMap$1.class:
  Invalid signature 'Landroid/support/v4/util/MapCollections<TK;TV;>.KeySet;' for field android.support.v4.util.MapCollections$KeySe
t android.support.v4.util.ArrayMap$1.mKeySet.
Signature is ignored and will not be present in the output.
Parser error: Unknown error parsing field signature: String index out of range: -30
Warning in lib.java/third_party/android_deps/com_android_support_support_compat_java.jar:android/support/v4/util/ArrayMap$1.class:
  Invalid signature 'Landroid/support/v4/util/MapCollections<TK;TV;>.ValuesCollection;' for field android.support.v4.util.MapCollect
ions$ValuesCollection android.support.v4.util.ArrayMap$1.mValues.
Signature is ignored and will not be present in the output.
Parser error: Unknown error parsing field signature: String index out of range: -30
[880/880] STAMP obj/components/cronet/android/cronet_smoketests_platform_only_instrumentation_apk.stamp