[Media Tabs] Add Audio and Video section

This CL adds the tabs that are actively using audio and video to a
separate "Audio & Video" section. This CL modifies the
tab-search-media-tabs flag to include an additional prototype for
exploration. The "Enabled" option will be the version where media tabs
are only shown in the "Audio & Video" section while the variation
"media tabs duplicated in open tabs" will have media tabs displayed in
both "Open Tabs" and "Audio & Video". The current proposal is to move
towards the former option while the latter will only be used for
exploration purposes. Relevant tests have been added for both versions.

Because we are leaning towards no media tab duplication in "Open Tabs",
a future CL will modify the "Open Tabs" title potentially to display
"Other Tabs" while there are tabs in the "Audio & Video" section and
"Open Tabs" otherwise. This will be dependent on UX.

Bug: 1261515

Change-Id: Iba6c1d4f1172056b506628aee984c4b53af929c8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3325651
Reviewed-by: Roman Arora <romanarora@chromium.org>
Commit-Queue: Elaine Chien <elainechien@chromium.org>
Cr-Commit-Position: refs/heads/main@{#953883}
11 files changed
tree: ab13a4536623f414acb72404749249f237913ee6
  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. cloud_print/
  13. codelabs/
  14. components/
  15. content/
  16. courgette/
  17. crypto/
  18. dbus/
  19. device/
  20. docs/
  21. extensions/
  22. fuchsia/
  23. gin/
  24. google_apis/
  25. google_update/
  26. gpu/
  27. headless/
  28. infra/
  29. ios/
  30. ipc/
  31. jingle/
  32. media/
  33. mojo/
  34. native_client_sdk/
  35. net/
  36. pdf/
  37. ppapi/
  38. printing/
  39. remoting/
  40. rlz/
  41. sandbox/
  42. services/
  43. skia/
  44. sql/
  45. storage/
  46. styleguide/
  47. testing/
  48. third_party/
  49. tools/
  50. ui/
  51. url/
  52. weblayer/
  53. .clang-format
  54. .clang-tidy
  55. .eslintrc.js
  56. .git-blame-ignore-revs
  57. .gitattributes
  58. .gitignore
  59. .gn
  60. .mailmap
  61. .rustfmt.toml
  62. .vpython
  63. .vpython3
  64. .yapfignore
  65. AUTHORS
  66. BUILD.gn
  67. CODE_OF_CONDUCT.md
  68. codereview.settings
  69. DEPS
  70. DIR_METADATA
  71. ENG_REVIEW_OWNERS
  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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