Adds flag-guarded support for retaining omnibox on focus.

This CL adds flag-guarded support for retaining omnibox contents on
focus (as opposed to clearing it). When enabled, omnibox contents will
also be fully selected (to allow for quick replace) and zero-prefixed
suggestions are still shown (to allow for quick search). When enabled,
only devices with large screens, attached keyboards, and attached
precision pointers are affected.

Design doc: http://shortn/_g7JfqshAX0

Before:
* google.com: http://shortn/_QQDvhI44dH
* NTP w/o paste: http://shortn/_RowwKkjjGM
* NTP w/ paste: http://shortn/_9Im63Fv4Ep

After:
* google.com: http://shortn/_29TqnQpVQE
* NTP w/o paste: http://shortn/_whJqKzcDnv
* NTP w/ paste: http://shortn/_ZnBOkVUvrU

Bug: 347632178
Change-Id: I8c8ceffa766ff7c960f122241ae3fb2efe3654c6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5804846
Reviewed-by: Patrick Noland <[email protected]>
Reviewed-by: Ted Choc <[email protected]>
Commit-Queue: David Black <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1354083}
30 files changed
tree: c5818c3803b410eef88d244413bd2387769a18cd
  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. google_update/
  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. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitallowed
  56. .gitattributes
  57. .gitignore
  58. .gitmodules
  59. .gn
  60. .mailmap
  61. .rustfmt.toml
  62. .vpython3
  63. .yapfignore
  64. ATL_OWNERS
  65. AUTHORS
  66. BUILD.gn
  67. CODE_OF_CONDUCT.md
  68. codereview.settings
  69. CPPLINT.cfg
  70. CRYPTO_OWNERS
  71. DEPS
  72. DIR_METADATA
  73. LICENSE
  74. LICENSE.chromium_os
  75. OWNERS
  76. PRESUBMIT.py
  77. PRESUBMIT_test.py
  78. PRESUBMIT_test_mocks.py
  79. README.md
  80. WATCHLISTS
README.md

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