Reland "NotificationRevamp: Fix screenshot notification."

This is a reland of 82963480929e2b3e58a2dca08f18f7d2726a41e7. Besides the reland, this added overridden functions to capture mode notification so that `extra_view_` is properly destructed.

Original change's description:
> NotificationRevamp: Fix screenshot notification.
>
> With the new refactor to NotificationViewBase's image_container_view_,
> CaptureModeNotificationView now only needs to create extra view in ctor
> and there's no need to have view observer. Removing these view observers
> also fixes the layout issue with extra view.
>
> This CL also added rounded corners for the banner view in the new
> notification.
>
> Bug: 1266583
> Change-Id: I890c26756cb62e457de754f88ebf1f332cc69ac8
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3268169
> Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
> Reviewed-by: Alex Newcomer <newcomer@chromium.org>
> Commit-Queue: Andre Le <leandre@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#939569}

Bug: 1266583
Change-Id: I4be2c5ba540a8cdeb921bd59b0c54838cb3a8564
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3271171
Commit-Queue: Andre Le <leandre@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Alex Newcomer <newcomer@chromium.org>
Cr-Commit-Position: refs/heads/main@{#940426}
5 files changed
tree: 9df8f3a39930168cf2e5349275e05fce84652861
  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. jingle/
  32. media/
  33. mojo/
  34. native_client_sdk/
  35. net/
  36. pdf/
  37. ppapi/
  38. printing/
  39. remoting/
  40. rlz/
  41. sandbox/
  42. services/
  43. skia/
  44. sql/
  45. storage/
  46. styleguide/
  47. testing/
  48. third_party/
  49. tools/
  50. ui/
  51. url/
  52. weblayer/
  53. .clang-format
  54. .clang-tidy
  55. .eslintrc.js
  56. .git-blame-ignore-revs
  57. .gitattributes
  58. .gitignore
  59. .gn
  60. .mailmap
  61. .rustfmt.toml
  62. .vpython
  63. .vpython3
  64. .yapfignore
  65. AUTHORS
  66. BUILD.gn
  67. CODE_OF_CONDUCT.md
  68. codereview.settings
  69. DEPS
  70. DIR_METADATA
  71. ENG_REVIEW_OWNERS
  72. LICENSE
  73. LICENSE.chromium_os
  74. OWNERS
  75. PRESUBMIT.py
  76. PRESUBMIT_test.py
  77. PRESUBMIT_test_mocks.py
  78. README.md
  79. WATCHLISTS
README.md

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