Reland "Adds check for service callback before enabling DW."

This is a reland of commit 5fa0d925327bae46b6bb9485cff087ca97bb1bda

A crash was observed while accessing the DirectWritingServiceCallback. To address this issue, additional check is added to verify if the service callback constructor exists in isEnabled and if not, disables DW service.

Original change's description:
> Adds check for service callback before enabling DW.
>
> Checks whether the service callback constructor exists in isEnabled
> and if not, disables DW service. This prevents crashing described in
> crbug/1375266.
>
> Bug: 1375266
> Change-Id: Ie2134ccbdd627b38b1b46e8ad4053227f2b765fd
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3960230
> Reviewed-by: Weilun Shi <sweilun@chromium.org>
> Reviewed-by: Mahesh Machavolu <mahesh.ma@samsung.com>
> Commit-Queue: Alex Mitra <alexmitra@chromium.org>
> Reviewed-by: Peter Conn <peconn@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1060407}

(cherry picked from commit 5fa0d925327bae46b6bb9485cff087ca97bb1bda)

Bug: 379724628
Change-Id: I6196cc70acd2d25ffed81e4be1e872106cb57cca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6038593
Reviewed-by: Darren Shen <shend@chromium.org>
Reviewed-by: Alex Mitra <alexmitra@chromium.org>
Commit-Queue: Mahesh Machavolu <mahesh.ma@samsung.com>
Cr-Commit-Position: refs/heads/main@{#1386623}
2 files changed
tree: 33c520924f315ef4984a2d47bca11e995d2cae6c
  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. crypto/
  16. dbus/
  17. device/
  18. docs/
  19. extensions/
  20. fuchsia_web/
  21. gin/
  22. google_apis/
  23. gpu/
  24. headless/
  25. infra/
  26. ios/
  27. ipc/
  28. media/
  29. mojo/
  30. native_client_sdk/
  31. net/
  32. pdf/
  33. ppapi/
  34. printing/
  35. remoting/
  36. rlz/
  37. sandbox/
  38. services/
  39. skia/
  40. sql/
  41. storage/
  42. styleguide/
  43. testing/
  44. third_party/
  45. tools/
  46. ui/
  47. url/
  48. webkit/
  49. .clang-format
  50. .clang-tidy
  51. .clangd
  52. .git-blame-ignore-revs
  53. .gitallowed
  54. .gitattributes
  55. .gitignore
  56. .gitmodules
  57. .gn
  58. .mailmap
  59. .rustfmt.toml
  60. .vpython3
  61. .yapfignore
  62. ATL_OWNERS
  63. AUTHORS
  64. BUILD.gn
  65. CODE_OF_CONDUCT.md
  66. codereview.settings
  67. CPPLINT.cfg
  68. CRYPTO_OWNERS
  69. DEPS
  70. DIR_METADATA
  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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