Reland "Reland "[UI] Disable bubble shadows and rounded corners without compositing""

This is a reland of commit b364074b0dd9fac88f747f1eea7571c8d1dafc6e.
The reland signals window compositing for headless, which is used in
some Fuchsia tests.

Original change's description:
> Reland "[UI] Disable bubble shadows and rounded corners without compositing"
>
> This is a reland of commit 7e6de0490e9fa5f3595eb9fb420241bf5bad0c50
>
> Original change's description:
> > [UI] Disable bubble shadows and rounded corners without compositing
> >
> > R=sky
> >
> > Change-Id: I1d6e29863ee5480faef7d87b3095efe0df2510a6
> > Bug: None
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5719018
> > Auto-Submit: Thomas Anderson <thomasanderson@chromium.org>
> > Reviewed-by: Scott Violet <sky@chromium.org>
> > Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
> > Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
> > Cr-Commit-Position: refs/heads/main@{#1330300}
>
> Bug: None
> Change-Id: Ief050bcd469c6de19256adeaa03e2360acaa1fdb
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5727138
> Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
> Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
> Reviewed-by: Scott Violet <sky@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1330568}

Bug: None
Change-Id: Icc0f50fb02b4c507521ed99ff92c36a08de5e585
Cq-Include-Trybots: luci.chromium.try:fuchsia-arm64-cast-receiver-rel
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5736726
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1334551}
4 files changed
tree: 45e704e54a92a3d46fcee003ad7917527b4b6c58
  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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To check out the source code locally, don't use git clone! Instead, follow the instructions on how to get the code.

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