[omnibox] Fix weird test-only wrong-thread init of InMemoryURLIndex

For some reason, InMemoryURLIndex has fake-initialization step used
only in unit tests that causes History methods to be executed on the
main thread, rather than the History sequence.

It's always been fine before, but ever since I committed this massive
CL below, there's been flakes:
https://chromium-review.googlesource.com/c/chromium/src/+/3871694

But I don't think the solution is to revert that massive CL, I think
we should actually fix the sequence confusion.

This CL does that by deleting this test-only call, and making the
tests follow the production initialization code path. The test only
code was strange and not necessary anyways.

Bug: 1362186, 1141539, 1365413, 1363466
Change-Id: I015b472fc0c7e2f8027710973612c1d22cc68908
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3906645
Reviewed-by: Orin Jaworski <orinj@chromium.org>
Commit-Queue: Tommy Li <tommycli@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1049422}
5 files changed
tree: df8cb3b5dce9c475a1f9012737aae0306622e834
  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. weblayer/
  51. .clang-format
  52. .clang-tidy
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitattributes
  56. .gitignore
  57. .gn
  58. .mailmap
  59. .rustfmt.toml
  60. .vpython3
  61. .yapfignore
  62. AUTHORS
  63. BUILD.gn
  64. CODE_OF_CONDUCT.md
  65. codereview.settings
  66. DEPS
  67. DIR_METADATA
  68. ENG_REVIEW_OWNERS
  69. LICENSE
  70. LICENSE.chromium_os
  71. OWNERS
  72. PRESUBMIT.py
  73. PRESUBMIT_test.py
  74. PRESUBMIT_test_mocks.py
  75. README.md
  76. WATCHLISTS
README.md

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