[shared storage] check ShouldDefinePrivateAggregationInSharedStorage() directly

Now that we enforce SecureContext for shared storage, the circumstance
for exposing the PA Host and JS object should now be identical, and
should only depend on base::Feature(s). So we remove the mojom
propagation of `should_define_private_aggregation_object`, and just
check the base::Feature(s) directly on the respective sites.

Bug: 1432378
Change-Id: I5eecb934e4e50b97d3200e27e53c512a4d1b5a44
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4420728
Code-Coverage: Findit <findit-for-me@appspot.gserviceaccount.com>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Alex Turner <alexmt@chromium.org>
Commit-Queue: Yao Xiao <yaoxia@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1130090}
12 files changed
tree: 25d51cf99d72ff2af544acbda2b4108b616113d8
  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. weblayer/
  51. .clang-format
  52. .clang-tidy
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitattributes
  56. .gitignore
  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. DEPS
  68. DIR_METADATA
  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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