Reland "Remove legacy Mojo Core from most build configs"

This is a reland of commit 13b1733de755bdc6b324c6888bdcebffde6d5ece

The original change was reverted because Windows builds were
still configured to package mojo_core.dll with the browser
even though we were no longer building it.

There are no longer any plans to use this DLL, so patchset 2
here removes all packaging of it.

Original change's description:
> Remove legacy Mojo Core from most build configs
>
> Other than Chrome OS and fuzzer builds, we don't need to support this
> anymore. Add a new buildflag (mojo_support_legacy_core) which defaults
> to false except in those cases, and don't build any of that code
> unless it's true.
>
> Bug: 359926651
> Change-Id: I1c207f2ee55ee28c9920ab6db3e3c2f447eccab2
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5789371
> Reviewed-by: Scott Violet <sky@chromium.org>
> Reviewed-by: Daniel Cheng <dcheng@chromium.org>
> Commit-Queue: Ken Rockot <rockot@google.com>
> Cr-Commit-Position: refs/heads/main@{#1342426}

Bug: 359926651
Change-Id: I6624315f3cdd230a51290bc487d33bb6324ca1a8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5792219
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Ken Rockot <rockot@google.com>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1342674}
27 files changed
tree: ea2946ced5454355e877427a513005712610c336
  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. CRYPTO_OWNERS
  72. DEPS
  73. DIR_METADATA
  74. LICENSE
  75. LICENSE.chromium_os
  76. OWNERS
  77. PRESUBMIT.py
  78. PRESUBMIT_test.py
  79. PRESUBMIT_test_mocks.py
  80. README.md
  81. WATCHLISTS
README.md

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The project's web site is https://www.chromium.org.

To check out the source code locally, don't use git clone! Instead, follow the instructions on how to get the code.

Documentation in the source is rooted in docs/README.md.

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For historical reasons, there are some small top level directories. Now the guidance is that new top level directories are for product (e.g. Chrome, Android WebView, Ash). Even if these products have multiple executables, the code should be in subdirectories of the product.

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