Moving the ProtocolHandlerThrottle to //components

This CL is part of the ongoing refactoring we are doing to move the
protocol handler logic to a new Custom Handler //component.

Inn order to move the ProtocolHandlerRegistry's browser tests we need
the ShellContentBrowserClient to implement the CreateURLLoaderThrottle
public API, in a similar way that the ChromeContentBrowserClient does.

This is a prior step to this abstract public API implementation, so
that both ContentBrowserClient implementations can share the throttle
logic to deal with custom protocol handlers.

This CL doesn't implement any behavior change, so I consider that no
additional tests are needed.

Bug: 1292925, 1139176
Change-Id: I230bc5a31b3b992754473d263028cee43162fe64
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3427644
Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Javier Fernandez <jfernandez@igalia.com>
Cr-Commit-Position: refs/heads/main@{#966731}
5 files changed
tree: 2ba8f6745f3cbc3aa3bea2edc348b46711dd9a9e
  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. media/
  32. mojo/
  33. native_client_sdk/
  34. net/
  35. pdf/
  36. ppapi/
  37. printing/
  38. remoting/
  39. rlz/
  40. sandbox/
  41. services/
  42. skia/
  43. sql/
  44. storage/
  45. styleguide/
  46. testing/
  47. third_party/
  48. tools/
  49. ui/
  50. url/
  51. weblayer/
  52. .clang-format
  53. .clang-tidy
  54. .eslintrc.js
  55. .git-blame-ignore-revs
  56. .gitattributes
  57. .gitignore
  58. .gn
  59. .mailmap
  60. .rustfmt.toml
  61. .vpython
  62. .vpython3
  63. .yapfignore
  64. AUTHORS
  65. BUILD.gn
  66. CODE_OF_CONDUCT.md
  67. codereview.settings
  68. DEPS
  69. DIR_METADATA
  70. ENG_REVIEW_OWNERS
  71. LICENSE
  72. LICENSE.chromium_os
  73. OWNERS
  74. PRESUBMIT.py
  75. PRESUBMIT_test.py
  76. PRESUBMIT_test_mocks.py
  77. README.md
  78. WATCHLISTS
README.md

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