NavigationThrottleRunner2: Decouple request and runner

This patch decouples the NavigationThrottleRunner from the
NavigationRequest, and makes it owned by the NavigationThrottleRegistry.
The registry will manage the runner v1 and v2 flip, behind a flag.

In the v2 runner, it allows more than one deferring throttle, and
this new abstraction at the NavigationThrottleRegistryImpl defines
a modified API set to support the case. Currently, it just wraps the
v1 runner and calls the original API set to mimic the new API set.

The registry's callers should care for the multiple deferring throttles
after this change, though the actual underlying implementation may
support only one deferring throttle within the default config.

Bug: 422003056
Change-Id: I3f6c82103562b7ce5b5f7fd133a332ebd142be42
Low-Coverage-Reason: not regressed by this CL
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6644612
Commit-Queue: Takashi Toyoshima <toyoshim@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1477778}
9 files changed
tree: eaa4b826ebb67b8877bebab1334dcc379587b281
  1. .github/
  2. android_webview/
  3. apps/
  4. ash/
  5. base/
  6. build/
  7. build_overrides/
  8. buildtools/
  9. cc/
  10. chrome/
  11. chromecast/
  12. chromeos/
  13. codelabs/
  14. components/
  15. content/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia_web/
  22. gin/
  23. google_apis/
  24. gpu/
  25. headless/
  26. infra/
  27. ios/
  28. ipc/
  29. media/
  30. mojo/
  31. native_client_sdk/
  32. net/
  33. pdf/
  34. ppapi/
  35. printing/
  36. remoting/
  37. rlz/
  38. sandbox/
  39. services/
  40. skia/
  41. sql/
  42. storage/
  43. styleguide/
  44. testing/
  45. third_party/
  46. tools/
  47. ui/
  48. url/
  49. webkit/
  50. .clang-format
  51. .clang-tidy
  52. .clangd
  53. .cursorignore
  54. .git-blame-ignore-revs
  55. .gitallowed
  56. .gitattributes
  57. .gitignore
  58. .gitmodules
  59. .gn
  60. .mailmap
  61. .rustfmt.toml
  62. .vpython3
  63. .yapfignore
  64. ATL_OWNERS
  65. AUTHORS
  66. BUILD.gn
  67. CODE_OF_CONDUCT.md
  68. codereview.settings
  69. CPPLINT.cfg
  70. CRYPTO_OWNERS
  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. SECURITY_OWNERS
  81. WATCHLISTS
README.md

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