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chromium/third_party/blink/web_tests/http/tests/inspector-protocol/network/request-interception-on-response-expected.txt 

Tests interception blocking, modification of network fetches.
Test started
Network agent enabled
Request interception enabled
Page agent enabled
Runtime agent enabled
Request Intercepted: simple-iframe.html
  responseStatusCode: 200
  responseHeaders:
    Accept-Ranges: bytes
    Connection: Keep-Alive
    Content-Length: 39
    Content-Type: text/html
    Date: <Masked>
    ETag: <Masked>
    Keep-Alive: <Masked>
    Last-Modified: <Masked>
    Server: <Masked>
  responseBody:
<html>
<body>hello world</body>
</html>

Body content received by renderer:
<html>
<body>This content was rewritten!</body>
</html>