Remove FirstRunService::EntryPoint enum

Originally, the idea was to remove only two menu items, `kWebAppLaunch`
and `kWebAppContextMenu`, since they were relevant in the context of Lacros,
which has been terminated.
However, dgn@ suggested that we remove the enum altogether, given that
the remaining items would become pointless and only server for histogram
logging.

This CL removes the enum altogether, as a follow up of [1].
Additionally, it removes the related histogram declaration, since
it was really intended to track the usage of the Lacros entrypoints,
and the usage for Dice was not really important.
Last, it also remove DICE build guards from the touched files.

[1] https://crrev.com/c/6074493

R=dgn@chromium.org, hidehiko@chromium.org, neis@chromium.org
Bug: 373971535, 382086296

OBSOLETE_HISTOGRAM[ProfilePicker.FirstRun.EntryPoint]=Deprecated in M133 - Unneeded now that Lacros support is removed.

Change-Id: Ie824c28aefa8ded572aad9c0f77449f7b140d297
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6088160
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Hidehiko Abe <hidehiko@chromium.org>
Commit-Queue: Antonio Gomes <tonikitoo@igalia.com>
Reviewed-by: Alex Ilin <alexilin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1396122}
7 files changed
tree: b00fc45dc2afe9e4401c61aa28eb6b87fe567b3b
  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. crypto/
  16. dbus/
  17. device/
  18. docs/
  19. extensions/
  20. fuchsia_web/
  21. gin/
  22. google_apis/
  23. gpu/
  24. headless/
  25. infra/
  26. ios/
  27. ipc/
  28. media/
  29. mojo/
  30. native_client_sdk/
  31. net/
  32. pdf/
  33. ppapi/
  34. printing/
  35. remoting/
  36. rlz/
  37. sandbox/
  38. services/
  39. skia/
  40. sql/
  41. storage/
  42. styleguide/
  43. testing/
  44. third_party/
  45. tools/
  46. ui/
  47. url/
  48. webkit/
  49. .clang-format
  50. .clang-tidy
  51. .clangd
  52. .git-blame-ignore-revs
  53. .gitallowed
  54. .gitattributes
  55. .gitignore
  56. .gitmodules
  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. CPPLINT.cfg
  68. CRYPTO_OWNERS
  69. DEPS
  70. DIR_METADATA
  71. LICENSE
  72. LICENSE.chromium_os
  73. OWNERS
  74. PRESUBMIT.py
  75. PRESUBMIT_test.py
  76. PRESUBMIT_test_mocks.py
  77. README.md
  78. WATCHLISTS
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