Fix save card infobar crash when reshown on ios.

Before this change, when save card infobar in loading state is closed
and reshown through omnibox icon, it is not updated to show the
confirmation and also causes chrome to crash when mediator tries to
autoclose the infobar after post confirmation. Reason being, the view
is now handled by a new mediator that is allocated upon reshow and the
delegate still holds a callback to the old mediator.

This CL, updates the mediator's callback reference in the delegate
each time a new mediator is allocated. Adds a safety check in the
mediator's `saveCardDelegate` to verify if the `config` exists which
could be a nullptr due to request being deleted on infobar dismissal.
Also informs the delegate each time infobar is presented or dismissed.

Screencast with the fix: http://go/scrcast/NjM0NzM5OTYzODI4NjMzNnwxYmM0ZjY3ZC1kYw
Screencast without the fix: http://go/scrcast/NTMyODI3MjYxODQyMjI3MnxjNjExZThiMC1iNw

Bug: 339887700, 355661465, 356208501
Change-Id: I652f7322a6eb1485723e3b783c2526f9df7d017b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5753227
Reviewed-by: Olivier Robin <olivierrobin@chromium.org>
Reviewed-by: Slobodan Pejic <slobodan@chromium.org>
Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
Reviewed-by: Chris Lu <thegreenfrog@chromium.org>
Commit-Queue: Kavita Soni <kavitasoni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1336884}
7 files changed
tree: 056ed4292c86d8d535674e20e2d28863b2195ef2
  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. webkit/
  51. .clang-format
  52. .clang-tidy
  53. .clangd
  54. .eslintrc.js
  55. .git-blame-ignore-revs
  56. .gitallowed
  57. .gitattributes
  58. .gitignore
  59. .gitmodules
  60. .gn
  61. .mailmap
  62. .rustfmt.toml
  63. .vpython3
  64. .yapfignore
  65. ATL_OWNERS
  66. AUTHORS
  67. BUILD.gn
  68. CODE_OF_CONDUCT.md
  69. codereview.settings
  70. CPPLINT.cfg
  71. DEPS
  72. DIR_METADATA
  73. LICENSE
  74. LICENSE.chromium_os
  75. OWNERS
  76. PRESUBMIT.py
  77. PRESUBMIT_test.py
  78. PRESUBMIT_test_mocks.py
  79. README.md
  80. WATCHLISTS
README.md

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