[FlexNG] Fragmentation for stretched items

As suggested in CL:3256656, refactor ApplyStretchAlignmentToChild()
to use BuildSpaceForLayout. To accomplish this, pass the final line
cross size into BuildSpaceForLayout during the final layout pass for
stretched items.

By doing this we can remove ApplyStretchAlignmentToChild(), and call
into LayoutWithBlockFragmentation() for stretched items if applicable
(since that will also call into BuildSpaceForLayout).

A new wpt test was added to test basic fragmentation for stretched flex
items.

virtual/layout_ng_flex_frag/fast/multicol/flexbox/doubly-nested-with-zero-width-flexbox-and-forced-break-crash.html
is now being skipped due to a timeout. Seems to be caused by the
forced break. This test was not timing out before since fragmentation
was not being applied to the test previously. This will be
investigated in a follow-up.

Bug: 660611
Change-Id: Ifefbe1480c7134c5fbf215cd1e03a8e79e45f1ff
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3267938
Commit-Queue: Alison Maher <almaher@microsoft.com>
Reviewed-by: David Grogan <dgrogan@chromium.org>
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Cr-Commit-Position: refs/heads/main@{#940473}
4 files changed
tree: 64b3df8afd28ed169a41e7a8b63026ba29d2ad99
  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. cloud_print/
  13. codelabs/
  14. components/
  15. content/
  16. courgette/
  17. crypto/
  18. dbus/
  19. device/
  20. docs/
  21. extensions/
  22. fuchsia/
  23. gin/
  24. google_apis/
  25. google_update/
  26. gpu/
  27. headless/
  28. infra/
  29. ios/
  30. ipc/
  31. jingle/
  32. media/
  33. mojo/
  34. native_client_sdk/
  35. net/
  36. pdf/
  37. ppapi/
  38. printing/
  39. remoting/
  40. rlz/
  41. sandbox/
  42. services/
  43. skia/
  44. sql/
  45. storage/
  46. styleguide/
  47. testing/
  48. third_party/
  49. tools/
  50. ui/
  51. url/
  52. weblayer/
  53. .clang-format
  54. .clang-tidy
  55. .eslintrc.js
  56. .git-blame-ignore-revs
  57. .gitattributes
  58. .gitignore
  59. .gn
  60. .mailmap
  61. .rustfmt.toml
  62. .vpython
  63. .vpython3
  64. .yapfignore
  65. AUTHORS
  66. BUILD.gn
  67. CODE_OF_CONDUCT.md
  68. codereview.settings
  69. DEPS
  70. DIR_METADATA
  71. ENG_REVIEW_OWNERS
  72. LICENSE
  73. LICENSE.chromium_os
  74. OWNERS
  75. PRESUBMIT.py
  76. PRESUBMIT_test.py
  77. PRESUBMIT_test_mocks.py
  78. README.md
  79. WATCHLISTS
README.md

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