Cleanup dead code for -webkit-pictograph

This CL removes dead code for -webkit-pictograph. It was added in [1]
after -webkit-body but CSS parser for generic font-family only accepts
keywords ranging from "serif" to "-webkit-body", at least since the
latter was introduced in [2].

Currently, the only test in Chromium is a pixel test [3] but it
actually works by checking the raw string in
FontSelector::FamilyNameFromSettings rather than relying on
enumerated values. Note that this case is different from "-webkit-body"
(mapped to the FontDescription::kStandardFamily enum) and from generic
names defined in the specification (mapped to "-webkit-*" strings).

This will free one place in GenericFamilyType so that one can introduce
the standard CSS property 'font-family: math' without increasing the
size of FontDescription [4].

[1] https://source.chromium.org/chromium/chromium/src/+/14fc7ad2ef480
[2] https://source.chromium.org/chromium/chromium/src/+/c9ed7cc38acd0
[3] third_party/blink/web_tests/fast/css/font-family-pictograph.html
[4] https://chromium-review.googlesource.com/c/chromium/src/+/2119534

Bug: 6606
Change-Id: I7cbfe5b4b4f47bbc5bba1a54c19d8d6d0249b206
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2119545
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Frédéric Wang <fwang@igalia.com>
Cr-Commit-Position: refs/heads/master@{#753959}
8 files changed
tree: c23cee57efbd280ea27e3d2262986011716cee1b
  1. .clang-format
  2. .clang-tidy
  3. .eslintrc.js
  4. .git-blame-ignore-revs
  5. .gitattributes
  6. .gitignore
  7. .gn
  8. .vpython
  9. .vpython3
  10. .yapfignore
  11. AUTHORS
  12. BUILD.gn
  13. CODE_OF_CONDUCT.md
  14. DEPS
  15. ENG_REVIEW_OWNERS
  16. LICENSE
  17. LICENSE.chromium_os
  18. OWNERS
  19. PRESUBMIT.py
  20. PRESUBMIT_test.py
  21. PRESUBMIT_test_mocks.py
  22. README.md
  23. WATCHLISTS
  24. android_webview/
  25. apps/
  26. ash/
  27. base/
  28. build/
  29. build_overrides/
  30. buildtools/
  31. cc/
  32. chrome/
  33. chromecast/
  34. chromeos/
  35. cloud_print/
  36. codereview.settings
  37. components/
  38. content/
  39. courgette/
  40. crypto/
  41. dbus/
  42. device/
  43. docs/
  44. extensions/
  45. fuchsia/
  46. gin/
  47. google_apis/
  48. google_update/
  49. gpu/
  50. headless/
  51. infra/
  52. ios/
  53. ipc/
  54. jingle/
  55. media/
  56. mojo/
  57. native_client_sdk/
  58. net/
  59. pdf/
  60. ppapi/
  61. printing/
  62. remoting/
  63. rlz/
  64. sandbox/
  65. services/
  66. skia/
  67. sql/
  68. storage/
  69. styleguide/
  70. testing/
  71. third_party/
  72. tools/
  73. ui/
  74. url/
  75. weblayer/
README.md

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