OsSettingsLanguages: Prevent spell check turning on with no languages

Language Settings V2 Update 2 should ensure that users never get into a
situation where spell check is on, but there are no enabled spell check
languages - as that misleadingly shows spell check being on without any
spell check actually occurring. This has already been implemented by
showing the "add spell check languages" dialog when turning on spell
check without any spell check languages.

However, there is a slight edge case with the current implementation.
If the user turns on spell check without any languages, and then closes
or navigates away from the page without adding a language / closing the
"add spell check languages" dialog, the user gets into the
aforementioned misleading state where spell check is on without any
languages.

This CL fixes this by ensuring that spell check is never turned on until
the user adds a spell check language, instead of turning off spell check
when the user _doesn't_ add a language.

Drive-by: Add a TODO for crbug.com/1226913 to fix build deps.

Bug: b:186372498
Change-Id: Ic25d43428f0ec5a23d573395dd328faf21af5b28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3008177
Commit-Queue: Michael Cui <mlcui@google.com>
Reviewed-by: My Nguyen <myy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#899449}
3 files changed
tree: 99154924ed8db9b8ff107ed58f897c8dfa7b198f
  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. .vpython
  62. .vpython3
  63. .yapfignore
  64. AUTHORS
  65. BUILD.gn
  66. CODE_OF_CONDUCT.md
  67. codereview.settings
  68. DEPS
  69. DIR_METADATA
  70. ENG_REVIEW_OWNERS
  71. LICENSE
  72. LICENSE.chromium_os
  73. OWNERS
  74. PRESUBMIT.py
  75. PRESUBMIT_test.py
  76. PRESUBMIT_test_mocks.py
  77. README.md
  78. WATCHLISTS
README.md

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