chromium/components/cronet/android/cronet_impl_platform_proguard.cfg

# Proguard config for apps that depend on cronet_impl_platform_java.jar.

# This constructor is called using the reflection from Cronet API (cronet_api.jar).
-keep class org.chromium.net.impl.JavaCronetProvider {
    public <init>(android.content.Context);
}