Add a feature param for the default HangWatcher monitoring period

This will allow changing the hang watch monitoring period via a Finch
experiment, if we need to, but it will also allow testing the
HangWatcher in browser tests.

Browser tests would need to shorten the monitoring period, so tests
don't need to wait 10 secondes to observe hangs. Because browser tests
run the HangWatcher in different child processes, the test body can't
directly access these HangWatcher instances. It can however configure
them by setting feature params, which are propagated to all spawned
processes.

Bug: 413314866
Change-Id: Ib00b711a6b90f7be99f768d25e00210c1475c26e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6638519
Reviewed-by: Olivier Li <olivierli@chromium.org>
Commit-Queue: Jean-Philippe Gravel <jpgravel@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1486297}
1 file changed
tree: 2da5d173bba34c1d89bf3b6c2e39e1a535e12546
  1. .github/
  2. agents/
  3. android_webview/
  4. apps/
  5. ash/
  6. base/
  7. build/
  8. build_overrides/
  9. buildtools/
  10. cc/
  11. chrome/
  12. chromecast/
  13. chromeos/
  14. codelabs/
  15. components/
  16. content/
  17. crypto/
  18. dbus/
  19. device/
  20. docs/
  21. extensions/
  22. fuchsia_web/
  23. gin/
  24. google_apis/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. media/
  31. mojo/
  32. net/
  33. pdf/
  34. ppapi/
  35. printing/
  36. remoting/
  37. rlz/
  38. sandbox/
  39. services/
  40. skia/
  41. sql/
  42. storage/
  43. styleguide/
  44. testing/
  45. third_party/
  46. tools/
  47. ui/
  48. url/
  49. webkit/
  50. .clang-format
  51. .clang-tidy
  52. .clangd
  53. .cursorignore
  54. .git-blame-ignore-revs
  55. .gitallowed
  56. .gitattributes
  57. .gitignore
  58. .gitmodules
  59. .gn
  60. .mailmap
  61. .rustfmt.toml
  62. .vpython3
  63. .yapfignore
  64. ATL_OWNERS
  65. AUTHORS
  66. BUILD.gn
  67. CODE_OF_CONDUCT.md
  68. codereview.settings
  69. CPPLINT.cfg
  70. CRYPTO_OWNERS
  71. DEPS
  72. DIR_METADATA
  73. LICENSE
  74. LICENSE.chromium_os
  75. OWNERS
  76. PRESUBMIT.py
  77. PRESUBMIT_test.py
  78. PRESUBMIT_test_mocks.py
  79. README.md
  80. SECURITY_OWNERS
  81. WATCHLISTS
README.md

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