Revert "Crostini Upgrader: Do not proceed if user cancels backup"

This reverts commit 9b8ade132312a47f1096beecfe16ba8d144e9056.

Reason for revert: Suspected for CrostiniUpgraderBrowserTest.All failure on linux-chromeos-chrome
https://ci.chromium.org/p/chrome/builders/ci/linux-chromeos-chrome/4053

Original change's description:
> Crostini Upgrader: Do not proceed if user cancels backup
> 
> Previously if the user cancelled the backup, we would proceed with the
> upgrade as though the user had elected not to backup at all.
> 
> With this change, the flow will instead return to the initial screen
> when the user cancels, rather than proceed.
> 
> Bug: 1061203
> Change-Id: I7be99a2c7a6caa4b5fd143def5ba0c6f9b4d5004
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2102935
> Reviewed-by: Nicholas Verne <[email protected]>
> Commit-Queue: Nic Hollingum <[email protected]>
> Cr-Commit-Position: refs/heads/master@{#750833}

[email protected],[email protected]

Change-Id: I7013aeba5b114186425d4279b8ef877c2bddcb79
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1061203
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2105664
Reviewed-by: Kunihiko Sakamoto <[email protected]>
Commit-Queue: Kunihiko Sakamoto <[email protected]>
Cr-Commit-Position: refs/heads/master@{#750870}
2 files changed
tree: 65153ff31d3e99fdd401d48e5f5654eee2c2e693
  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. components/
  14. content/
  15. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. jingle/
  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. .vpython
  60. .vpython3
  61. .yapfignore
  62. AUTHORS
  63. BUILD.gn
  64. CODE_OF_CONDUCT.md
  65. codereview.settings
  66. DEPS
  67. ENG_REVIEW_OWNERS
  68. LICENSE
  69. LICENSE.chromium_os
  70. OWNERS
  71. PRESUBMIT.py
  72. PRESUBMIT_test.py
  73. PRESUBMIT_test_mocks.py
  74. README.md
  75. WATCHLISTS
README.md

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