Test that fetch and XHR responses can be streamed
Number of discovered service workers: 1

Test fetch:

Data received #1: {
    method : Network.dataReceived
    params : {
        dataLength : 11
        encodedDataLength : 0
        requestId : <string>
        timestamp : <number>
    }
    sessionId : <string>
}
Network.streamResourceContent response: {
    id : <number>
    result : {
        bufferedData : ZGF0YTogdGVzdDE=
    }
    sessionId : <string>
}
Data received #2: {
    method : Network.dataReceived
    params : {
        data : ZGF0YTogdGVzdDI=
        dataLength : 11
        encodedDataLength : 0
        requestId : <string>
        timestamp : <number>
    }
    sessionId : <string>
}
Data received #3: {
    method : Network.dataReceived
    params : {
        data : ZGF0YTogdGVzdDM=
        dataLength : 11
        encodedDataLength : 0
        requestId : <string>
        timestamp : <number>
    }
    sessionId : <string>
}

Test XHR:

Data received #1: {
    method : Network.dataReceived
    params : {
        dataLength : 11
        encodedDataLength : 0
        requestId : <string>
        timestamp : <number>
    }
    sessionId : <string>
}
Network.streamResourceContent response: {
    id : <number>
    result : {
        bufferedData : ZGF0YTogdGVzdDE=
    }
    sessionId : <string>
}
Data received #2: {
    method : Network.dataReceived
    params : {
        data : ZGF0YTogdGVzdDI=
        dataLength : 11
        encodedDataLength : 0
        requestId : <string>
        timestamp : <number>
    }
    sessionId : <string>
}
Data received #3: {
    method : Network.dataReceived
    params : {
        data : ZGF0YTogdGVzdDM=
        dataLength : 11
        encodedDataLength : 0
        requestId : <string>
        timestamp : <number>
    }
    sessionId : <string>
}