[ios] Fix crash in SessionRestorationServiceImpl

The code for handling detached WebState would crash if a realized
WebState was inserted in a Browser and detached before the Browser
could be saved because no metadata was present in the metadata_map.

Add a check when handling detached WebState to skip items without
metadata. This is okay since OrphanInfo is only used when adopting
an unrealized WebState, and unrealized WebState metadata is always
present in the map (it is either inserted when loaded from disk,
when adopted from another Browser or when created by the helper
`CreateUnrealizedWebState`).

Fixed: 329219388
Change-Id: I3b912636256bedcd2ae597a423324b5341604f1d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5366069
Auto-Submit: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Federica Germinario <fedegermi@google.com>
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Federica Germinario <fedegermi@google.com>
Cr-Commit-Position: refs/heads/main@{#1272152}
2 files changed
tree: 4d7a956bb6c5b4ad34af8dd2213f1fb036876037
  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. DEPS
  71. DIR_METADATA
  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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