[Extensions] Clean up ExtensionTabUtil::OpenTab()'s browser selection

ExtensionTabUtil::OpenTab() tries to find or create a browser to open
a tab in, but the browser selection is rather clunky and inconsistent.
This CL isolates more of the logic and improves a few egregious cases
while trying to minimize behavior changes and the risk of breakage for
any extensions relying on the existing behavior.

Some changes:
* Reduce and concentrate the number of calls to fall back to a tabbed
  browser or create a new browser.
* Prevent the possibility of creating *multiple* new browsers.
* Prevent some cases where we could create a new browser only to throw
  an error (and not open the tab).

In addition to addressing some bad scenarios, this will also make this
method easier to port to the experimental desktop android platform.

Bug: 468223125, 430344931
Change-Id: Ibd02d43ade81c8db46495d46edaf717c05d05a14
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7256997
Reviewed-by: James Cook <jamescook@chromium.org>
Commit-Queue: Devlin Cronin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1558367}
1 file changed
tree: 249d7f913fa97b294b4cf99291276274f833e7cd
  1. .gemini/
  2. .github/
  3. agents/
  4. android_webview/
  5. apps/
  6. ash/
  7. base/
  8. build/
  9. build_overrides/
  10. buildtools/
  11. cc/
  12. chrome/
  13. chromecast/
  14. chromeos/
  15. codelabs/
  16. components/
  17. content/
  18. crypto/
  19. dbus/
  20. device/
  21. docs/
  22. extensions/
  23. fuchsia_web/
  24. gin/
  25. google_apis/
  26. gpu/
  27. headless/
  28. infra/
  29. ios/
  30. ipc/
  31. media/
  32. mojo/
  33. net/
  34. pdf/
  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. .cursorignore
  54. .geminiignore
  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. CPPLINT.cfg
  71. CRYPTO_OWNERS
  72. DEPS
  73. DIR_METADATA
  74. LICENSE
  75. LICENSE.chromium_os
  76. OWNERS
  77. PRESUBMIT.py
  78. PRESUBMIT_test.py
  79. PRESUBMIT_test_mocks.py
  80. README.md
  81. SECURITY_OWNERS
  82. WATCHLISTS
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