Revert "VT: Require a documentElement for the transition to happen"

This reverts commit 39f8928063ad59b8e711e6c506988749067e3e3b.

Reason for revert:
  Added test is failing on "Linux Tests" on a virtual suite: https://ci.chromium.org/ui/p/chromium/builders/ci/Linux%20Tests/125697/overview

Original change's description:
> VT: Require a documentElement for the transition to happen
>
> This patch ensures that we don't start a transition if we don't
> have a document element. This is because documentElement is the
> originating element for the pseudo tree, so we need to have it
> for the transition to happen.
>
> Note that if we want to support documents that don't have a
> documentElement, then we need to figure out where to put the
> pseudo elements.
>
> R=​khushalsagar@chromium.org
>
> Fixed: 1410435
> Change-Id: Ib380e87dba2986ace6a567f37ff2cfa5b30268ec
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4198955
> Reviewed-by: Khushal Sagar <khushalsagar@chromium.org>
> Commit-Queue: Khushal Sagar <khushalsagar@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1097990}

Change-Id: I4951a882eb0ea758eff2d27f6ed531c9c303c96a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4199443
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Jonathan Lee <jonathanjlee@google.com>
Owners-Override: Jonathan Lee <jonathanjlee@google.com>
Cr-Commit-Position: refs/heads/main@{#1098039}
2 files changed
tree: ce4d781a5a0fd8b1a5e1b340e83a5ac9d805b00e
  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. weblayer/
  51. .clang-format
  52. .clang-tidy
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitattributes
  56. .gitignore
  57. .gn
  58. .mailmap
  59. .rustfmt.toml
  60. .vpython3
  61. .yapfignore
  62. ATL_OWNERS
  63. AUTHORS
  64. BUILD.gn
  65. CODE_OF_CONDUCT.md
  66. codereview.settings
  67. DEPS
  68. DIR_METADATA
  69. LICENSE
  70. LICENSE.chromium_os
  71. OWNERS
  72. PRESUBMIT.py
  73. PRESUBMIT_test.py
  74. PRESUBMIT_test_mocks.py
  75. README.md
  76. WATCHLISTS
README.md

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