ozone/wayland: Fix regression in input field selection

Fix regression caused by https://crrev.com/c/6626557 which made text
input empty on re-focus.

Cause for regression: If empty preedit is notified when there is no
existing preedit, it clears the surrounding text internally in chromium.

So ensure preedit is notified only when it is different from previously
applied preedit.

R=fangzhoug

Bug: 409716545
Fixed: 423207116
Change-Id: I6426d89962e3ceaa35a64724c654491c8cc9e6cf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6634635
Reviewed-by: Kramer Ge <fangzhoug@chromium.org>
Commit-Queue: Orko Garai <orko@igalia.com>
Cr-Commit-Position: refs/heads/main@{#1472161}
3 files changed
tree: 86511c5063adbb0376c16dd84e04636fd6606a48
  1. .github/
  2. android_webview/
  3. apps/
  4. ash/
  5. base/
  6. build/
  7. build_overrides/
  8. buildtools/
  9. cc/
  10. chrome/
  11. chromecast/
  12. chromeos/
  13. codelabs/
  14. components/
  15. content/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia_web/
  22. gin/
  23. google_apis/
  24. gpu/
  25. headless/
  26. infra/
  27. ios/
  28. ipc/
  29. media/
  30. mojo/
  31. native_client_sdk/
  32. net/
  33. pdf/
  34. ppapi/
  35. printing/
  36. remoting/
  37. rlz/
  38. sandbox/
  39. services/
  40. skia/
  41. sql/
  42. storage/
  43. styleguide/
  44. testing/
  45. third_party/
  46. tools/
  47. ui/
  48. url/
  49. webkit/
  50. .clang-format
  51. .clang-tidy
  52. .clangd
  53. .git-blame-ignore-revs
  54. .gitallowed
  55. .gitattributes
  56. .gitignore
  57. .gitmodules
  58. .gn
  59. .mailmap
  60. .rustfmt.toml
  61. .vpython3
  62. .yapfignore
  63. ATL_OWNERS
  64. AUTHORS
  65. BUILD.gn
  66. CODE_OF_CONDUCT.md
  67. codereview.settings
  68. CPPLINT.cfg
  69. CRYPTO_OWNERS
  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. SECURITY_OWNERS
  80. WATCHLISTS
README.md

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