Revert "[toolbarpinning] Update Chrome Labs code for ToolbarPinning."

This reverts commit 503e462d723aee3925daee7c787a773a14149462.

Reason for revert: Potentially causing test failures, e.g. https://ci.chromium.org/ui/p/chromium/builders/ci/Network%20Service%20Linux/84144/overview

Original change's description:
> [toolbarpinning] Update Chrome Labs code for ToolbarPinning.
>
> With ToolbarPinning, the Chrome Labs button should now use its Pinned Toolbar Action Button, rather than the current toolbar button. This CL adds code to choose the appropriate button for anchoring the Chrome Labs bubble. It also moves the ChromeLabsCoordinator into BrowserWindowFeatures and updates ownership of Chrome Labs components.
>
> This CL also introduces a migration to pin the Chrome Labs button by default.
>
> Bug: 323962536
> Change-Id: Icddc545659fb35038cc4eba2d61a7ffcdc47c620
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5710713
> Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
> Commit-Queue: Joseph Park <josephjoopark@chromium.org>
> Reviewed-by: David Pennington <dpenning@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1335797}

Bug: 323962536
Change-Id: I9a8a5cbd88c5b6d355da98b79eeb967b833d602f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5755525
Owners-Override: Rakina Zata Amni <rakina@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Rakina Zata Amni <rakina@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1335867}
30 files changed
tree: f5fcf44bfe5973c362892b92e8efa00de39cebde
  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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