hid: Abstract HidSystemTrayIcon class for profiles' HID connections

The change is part of the change list chain for
go/usb-hid-extension-permission-ux that we need to show an icon to have
users aware Chrome is accessing HID device(s) and create a notification
to notify users that an extension just opens a connection to a HID
device.

This changelist adds an abstract HidSystemTrayIcon class which is called
by HidConnectionTracker to notify the number of connections for its
profile. In the following changes after this changelist, there will be
new classes for implementing HidSystemTrayIcon on different platforms.

Bug: 1360981
Change-Id: I4b4a30df755fa67901da1608d97aba093ad6c589
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4032656
Reviewed-by: Colin Blundell <blundell@chromium.org>
Commit-Queue: Jack Hsieh <chengweih@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1082472}
17 files changed
tree: f4b3ce5bf2bc82acd1d2931949b3105c3a82426b
  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. 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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