Reland "Switch the Linux official build to PGO (from AFDO)."

This is a reland of 4be5a8c2578feed1c83fde07d3ebf7c779127719

Fix: Disabled PGO for the LaCrOS builds as we don't know if it's what we
want (vs AFDO). If we decide to use PGO for LaCrOS then we'll do it in a
separate CL.

Original change's description:
> Switch the Linux official build to PGO (from AFDO).
>
> This switches the Linux official build from AFDO to PGO. This yield some
> 3-4% performance gains on Speedometer and help unifying our desktop
> build configurations, PGO is already used on Win and Mac. The PGO
> profiles for Linux are generated by a continuous bot and are rolled in
> Chrome once or twice per day (AFDO is based on the Android profiles).
>
> This increases binary size by ~3-4%.
>
> Bug: 1111437
> Change-Id: I565eb336fa5ad9480e99808ed49246634255b82d
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2404620
> Commit-Queue: S├ębastien Marchand <sebmarchand@chromium.org>
> Reviewed-by: Nico Weber <thakis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#809040}

Bug: 1111437
Change-Id: I3eb551007d66edb4c9ff326c801dda7e0ddd593c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2424669
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809803}
2 files changed
tree: 115444c72141f54547bfe980b086a2337465131d
  1. .clang-format
  2. .clang-tidy
  3. .eslintrc.js
  4. .git-blame-ignore-revs
  5. .gitattributes
  6. .gitignore
  7. .gn
  8. .vpython
  9. .vpython3
  10. .yapfignore
  11. AUTHORS
  12. BUILD.gn
  13. CODE_OF_CONDUCT.md
  14. DEPS
  15. DIR_METADATA
  16. ENG_REVIEW_OWNERS
  17. LICENSE
  18. LICENSE.chromium_os
  19. OWNERS
  20. PRESUBMIT.py
  21. PRESUBMIT_test.py
  22. PRESUBMIT_test_mocks.py
  23. README.md
  24. WATCHLISTS
  25. android_webview/
  26. apps/
  27. ash/
  28. base/
  29. build/
  30. build_overrides/
  31. buildtools/
  32. cc/
  33. chrome/
  34. chromecast/
  35. chromeos/
  36. cloud_print/
  37. codereview.settings
  38. components/
  39. content/
  40. courgette/
  41. crypto/
  42. dbus/
  43. device/
  44. docs/
  45. extensions/
  46. fuchsia/
  47. gin/
  48. google_apis/
  49. google_update/
  50. gpu/
  51. headless/
  52. infra/
  53. ios/
  54. ipc/
  55. jingle/
  56. media/
  57. mojo/
  58. native_client_sdk/
  59. net/
  60. pdf/
  61. ppapi/
  62. printing/
  63. remoting/
  64. rlz/
  65. sandbox/
  66. services/
  67. skia/
  68. sql/
  69. storage/
  70. styleguide/
  71. testing/
  72. third_party/
  73. tools/
  74. ui/
  75. url/
  76. weblayer/
README.md

Logo Chromium

Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all users to experience the web.

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

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

Learn how to Get Around the Chromium Source Code Directory Structure .

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.