[merge M87][blink scheduler] Enable OptOutZeroTimeoutTimersFromThrottling by default.

setTimeout(..., 0) can be used to schedule a continuation. Opting out
these timers from throttling reduces latency to receive notifications
on some background pages and does not significantly affect speed or
resource usage.

Full cleanup will happen after the 1% Stable Experiment is complete.

Experiment results: https://docs.google.com/document/d/1frGCY_ZCM0VYwThAVAxNRvEDnd5hbAHDgkyA5Tsawts/edit?usp=sharing

(cherry picked from commit ddb94c4251feef1de8b3bd150f57e20b8c054fa3)

Bug: 1075553
Change-Id: I0c1546d13e0aa8891479370ffb1706b75c9c77d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2443230
Commit-Queue: François Doray <[email protected]>
Reviewed-by: Robert Kaplow <[email protected]>
Reviewed-by: Kentaro Hara <[email protected]>
Reviewed-by: Scott Haseley <[email protected]>
Auto-Submit: François Doray <[email protected]>
Cr-Original-Commit-Position: refs/heads/master@{#813925}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2461151
Reviewed-by: François Doray <[email protected]>
Cr-Commit-Position: refs/branch-heads/4280@{#143}
Cr-Branched-From: ea420fb963f9658c9969b6513c56b8f47efa1a2a-refs/heads/master@{#812852}
6 files changed
tree: 9bcba7880bd714d2a90ab4c5ae67f537df095bec
  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. cloud_print/
  13. components/
  14. content/
  15. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. jingle/
  31. media/
  32. mojo/
  33. native_client_sdk/
  34. net/
  35. pdf/
  36. ppapi/
  37. printing/
  38. remoting/
  39. rlz/
  40. sandbox/
  41. services/
  42. skia/
  43. sql/
  44. storage/
  45. styleguide/
  46. testing/
  47. third_party/
  48. tools/
  49. ui/
  50. url/
  51. weblayer/
  52. .clang-format
  53. .clang-tidy
  54. .eslintrc.js
  55. .git-blame-ignore-revs
  56. .gitattributes
  57. .gitignore
  58. .gn
  59. .vpython
  60. .vpython3
  61. .yapfignore
  62. AUTHORS
  63. BUILD.gn
  64. CODE_OF_CONDUCT.md
  65. codereview.settings
  66. DEPS
  67. DIR_METADATA
  68. ENG_REVIEW_OWNERS
  69. LICENSE
  70. LICENSE.chromium_os
  71. OWNERS
  72. PRESUBMIT.py
  73. PRESUBMIT_test.py
  74. PRESUBMIT_test_mocks.py
  75. README.md
  76. WATCHLISTS
README.md

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

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.