extensions: Open regular page if chrome://extensions opened in incognito

When chrome://extensions is accessed in an incognito tab, it should
open the page on the regular tab. This change implements it by updating
ExternalNavigationHandler to rewrite the request to an intent to open
the page, and updating intent handler to be able to handle the specific
URL.

Test: Open chrome://extensions in incognito tab on desktop android, and
confirm a new regular tab is opened and it shows chrome://extensions

Bug: 418106849
Change-Id: I460208ecf864fed45ff126d3abfa3a817bf26f17
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6562662
Reviewed-by: Theresa Sullivan <twellington@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Keigo Oka <oka@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1466893}
7 files changed
tree: 70b45c6e055626d0fc681f7dc248a690e430a062
  1. .github/
  2. android_webview/
  3. apps/
  4. ash/
  5. base/
  6. build/
  7. build_overrides/
  8. buildtools/
  9. cc/
  10. chrome/
  11. chromecast/
  12. chromeos/
  13. codelabs/
  14. components/
  15. content/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia_web/
  22. gin/
  23. google_apis/
  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. .git-blame-ignore-revs
  54. .gitallowed
  55. .gitattributes
  56. .gitignore
  57. .gitmodules
  58. .gn
  59. .mailmap
  60. .rustfmt.toml
  61. .vpython3
  62. .yapfignore
  63. ATL_OWNERS
  64. AUTHORS
  65. BUILD.gn
  66. CODE_OF_CONDUCT.md
  67. codereview.settings
  68. CPPLINT.cfg
  69. CRYPTO_OWNERS
  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. SECURITY_OWNERS
  80. WATCHLISTS
README.md

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