[code health] Remove use of render host creation notification

This CL removes the use of the NotificationService to receive
notification of a render process host creation in the
VisitedLinkEventListener. The NotificationService is replace with the
RenderProcessHostCreationObserver.

The unittests have been updated to call the observer instead of emitting
the notification.

More details can be seen in the bug.

Bug: 357627
Change-Id: I9b920abedb5e8ab3f2580b73db260686e2eed77f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3345129
Reviewed-by: Nico Weber <[email protected]>
Auto-Submit: Dan Sinclair <[email protected]>
Commit-Queue: Dan Sinclair <[email protected]>
Cr-Commit-Position: refs/heads/main@{#976229}
3 files changed
tree: 1322bb7cdc23154a44a7cc3a6bb5bdb15aaf752a
  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. codelabs/
  14. components/
  15. content/
  16. courgette/
  17. crypto/
  18. dbus/
  19. device/
  20. docs/
  21. extensions/
  22. fuchsia/
  23. gin/
  24. google_apis/
  25. google_update/
  26. gpu/
  27. headless/
  28. infra/
  29. ios/
  30. ipc/
  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. .mailmap
  60. .rustfmt.toml
  61. .vpython
  62. .vpython3
  63. .yapfignore
  64. AUTHORS
  65. BUILD.gn
  66. CODE_OF_CONDUCT.md
  67. codereview.settings
  68. DEPS
  69. DIR_METADATA
  70. ENG_REVIEW_OWNERS
  71. LICENSE
  72. LICENSE.chromium_os
  73. OWNERS
  74. PRESUBMIT.py
  75. PRESUBMIT_test.py
  76. PRESUBMIT_test_mocks.py
  77. README.md
  78. WATCHLISTS
README.md

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