Reland "Avoid nested runloops by default in PostToServerAndWait()"

This is a reland of commit a9f8f8f54432f0ac8a493f5548588f105301a613
It enables back the use of nested runloops in the failing tests so
that they can be further investigated and fixed incrementally in
separate CLs.

Original change's description:
> Avoid nested runloops by default in PostToServerAndWait()
>
> Tests seem to work just fine after setting no_nested_runloops to true in
> all tests except for WaylandDataDragControllerTest.DropWhileFetchingData
>
> Bug: 328783999
> Change-Id: I510ed515a5ff9dfeac524c5e85d4505b809e8852
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5669910
> Commit-Queue: Nick Yamane <nickdiego@igalia.com>
> Reviewed-by: Orko Garai <orko@igalia.com>
> Reviewed-by: Max Ihlenfeldt <max@igalia.com>
> Cr-Commit-Position: refs/heads/main@{#1332288}

Bug: 328783999
Change-Id: If48cc0693c7f4185b90fa1f6fca95d0e2acda7d8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5743296
Reviewed-by: Orko Garai <orko@igalia.com>
Reviewed-by: Nick Yamane <nickdiego@igalia.com>
Commit-Queue: Miguel López López <mlopez@igalia.com>
Cr-Commit-Position: refs/heads/main@{#1336254}
3 files changed
tree: 1dc818a6849e9c802753d97fc8fe4b4a955ca2a1
  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_web/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. media/
  31. mojo/
  32. native_client_sdk/
  33. net/
  34. pdf/
  35. ppapi/
  36. printing/
  37. remoting/
  38. rlz/
  39. sandbox/
  40. services/
  41. skia/
  42. sql/
  43. storage/
  44. styleguide/
  45. testing/
  46. third_party/
  47. tools/
  48. ui/
  49. url/
  50. webkit/
  51. .clang-format
  52. .clang-tidy
  53. .clangd
  54. .eslintrc.js
  55. .git-blame-ignore-revs
  56. .gitallowed
  57. .gitattributes
  58. .gitignore
  59. .gitmodules
  60. .gn
  61. .mailmap
  62. .rustfmt.toml
  63. .vpython3
  64. .yapfignore
  65. ATL_OWNERS
  66. AUTHORS
  67. BUILD.gn
  68. CODE_OF_CONDUCT.md
  69. codereview.settings
  70. CPPLINT.cfg
  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. WATCHLISTS
README.md

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