[Merge] [Private Network Access] Avoid notifying about closed socket.

This can happen due to the following race in the network code:

1. Socket is re-used from socket pools, `SocketPosix::IsConnected()`
   returns true.
2. Remote side closes the socket.
3. `HttpStream::GetRemoteEndpoint()` fails during
   `HttpNetworkTransaction::DoConnectedCallback()` because the socket is
   not connected anymore

The race caused flakiness when establishing connections to non-public
servers that do not serve `Connection: close` headers yet support only a
single request per socket. This is the case for some web platform tests.

Tested this manually by running the flaky test 5000 times with no
flakes. Previously it would fail once every couple hundred times fairly
reliably.

(cherry picked from commit 5cf08f1bfdc34ca9b68520d12f7dd61177384dd3)

Fixed: chromium:1322072
Change-Id: I8cdbf52d04cbec3f52a1d3e0a8a7779bd4346605
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3652198
Reviewed-by: David Benjamin <davidben@chromium.org>
Auto-Submit: Titouan Rigoudy <titouan@chromium.org>
Commit-Queue: Titouan Rigoudy <titouan@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1005811}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3692108
Commit-Queue: Matt Menke <mmenke@chromium.org>
Reviewed-by: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/branch-heads/5060@{#659}
Cr-Branched-From: b83393d0f4038aeaf67f970a024d8101df7348d1-refs/heads/main@{#1002911}
20 files changed
tree: cfc2c20d31984f673806dd4b90f5ddf8453fb10b
  1. android_webview/
  2. apps/
  3. ash/
  4. base/
  5. build/
  6. build_overrides/
  7. buildtools/
  8. cc/
  9. chrome/
  10. chromecast/
  11. chromeos/
  12. codelabs/
  13. components/
  14. content/
  15. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia/
  22. fuchsia_webengine/
  23. gin/
  24. google_apis/
  25. google_update/
  26. gpu/
  27. headless/
  28. infra/
  29. ios/
  30. ipc/
  31. media/
  32. mojo/
  33. native_client_sdk/
  34. net/
  35. pdf/
  36. ppapi/
  37. printing/
  38. remoting/
  39. rlz/
  40. sandbox/
  41. services/
  42. skia/
  43. sql/
  44. storage/
  45. styleguide/
  46. testing/
  47. third_party/
  48. tools/
  49. ui/
  50. url/
  51. weblayer/
  52. .clang-format
  53. .clang-tidy
  54. .eslintrc.js
  55. .git-blame-ignore-revs
  56. .gitattributes
  57. .gitignore
  58. .gn
  59. .mailmap
  60. .rustfmt.toml
  61. .vpython
  62. .vpython3
  63. .yapfignore
  64. AUTHORS
  65. BUILD.gn
  66. CODE_OF_CONDUCT.md
  67. codereview.settings
  68. DEPS
  69. DIR_METADATA
  70. ENG_REVIEW_OWNERS
  71. LICENSE
  72. LICENSE.chromium_os
  73. OWNERS
  74. PRESUBMIT.py
  75. PRESUBMIT_test.py
  76. PRESUBMIT_test_mocks.py
  77. README.md
  78. WATCHLISTS
README.md

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