[iOS][Waffle] Add default search engine icon

It is possible to have no embedded icons for prepopulated search
engines in EEA countries. This happen when the user select
a prepopulated search engine outside of EEA counties, and then switch
to a EEA countries. The selected search engine is still part of
prepopulated search engine, but it doesn't have an embedded icons.

To avoid DCHECK/CHECK issues, the temporary solution is to use
`default_world_favicon` icon. This patch will be merged in M123.

For M124, the code will be update to download icon if it doesn't exist.

(cherry picked from commit f22d8a2d9fd34e7c7f1d622895230ac4c3afb47e)

Fixed: 326221623, 326553778
Change-Id: Ic38ea3d94bb918a7fd4e2bc02bb934a8ea658bc3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5314600
Reviewed-by: Samar Chehade-Lepleux <samarchehade@google.com>
Reviewed-by: Nicolas Dossou-Gbété <dgn@chromium.org>
Commit-Queue: Nicolas Dossou-Gbété <dgn@chromium.org>
Auto-Submit: Jérôme Lebel <jlebel@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1263888}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5318047
Reviewed-by: Jérôme Lebel <jlebel@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
Cr-Commit-Position: refs/branch-heads/6312@{#97}
Cr-Branched-From: 6711dcdae48edaf98cbc6964f90fac85b7d9986e-refs/heads/main@{#1262506}
1 file changed
tree: 055968f8f950bad5a7c2c60337a0d6dd0a8f8903
  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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