Add more comprehensive metrics for download deep scanning

This CL adds a new metric, SBClientDownload.DeepScanEvent, which tracks
several events that were previously only recorded implicitly in other
metrics (such as prompts shown being equal to
SBClientDownload.CheckDownloadStats's ADVANCED_PROTECTION_PROMPT
bucket). This metric will be used to compare the effectiveness of the
old and new UX.

This CL also removes references to Advanced Protection due to the
previously launched expansion of deep scanning to ESB users.

Bug: 1424527
Change-Id: Idba21304326e02f1667a1c6efd16a988d5806dc1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4374672
Commit-Queue: Daniel Rubery <drubery@chromium.org>
Reviewed-by: Lily Chen <chlily@chromium.org>
Reviewed-by: Min Qin <qinmin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1123265}
8 files changed
tree: 40ec2333599d33d7433c2858a6467a7bd32316b8
  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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