[Web Payment] Content Security Checker on Android

Before this patch, Web Payment API on Android did not obey Content
Security Policy (CSP) rules when downloading payment method manifests
and web app manifests of payment apps. The manifest downloads are
managed in the browser, while CSP rules are managed in the renderer.

This patch pipes the CSP check through the Android-specific
PaymentRequestClient Mojo connection to the renderer.

After this patch, if chrome://flags/#web-payment-api-csp is set to
"Enabled", then Web Payment API on Android will obey CSP rules when
downloading payment method manifests and web app manifests of payment
apps.

Intent to prototype:
https://groups.google.com/a/chromium.org/g/blink-dev/c/jklZJYcOVyg/m/Gfwa4QQBAwAJ

Bug: 1349091
Change-Id: I7d758c7ca67a9649ba1eb54491e7ad98e623f992
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3892427
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Commit-Queue: Rouslan Solomakhin <rouslan@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1050323}
26 files changed
tree: 4d2d7d3803535cf9dd70920914207e437501bfbe
  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. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia_web/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. media/
  31. mojo/
  32. native_client_sdk/
  33. net/
  34. pdf/
  35. ppapi/
  36. printing/
  37. remoting/
  38. rlz/
  39. sandbox/
  40. services/
  41. skia/
  42. sql/
  43. storage/
  44. styleguide/
  45. testing/
  46. third_party/
  47. tools/
  48. ui/
  49. url/
  50. weblayer/
  51. .clang-format
  52. .clang-tidy
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitattributes
  56. .gitignore
  57. .gn
  58. .mailmap
  59. .rustfmt.toml
  60. .vpython3
  61. .yapfignore
  62. AUTHORS
  63. BUILD.gn
  64. CODE_OF_CONDUCT.md
  65. codereview.settings
  66. DEPS
  67. DIR_METADATA
  68. ENG_REVIEW_OWNERS
  69. LICENSE
  70. LICENSE.chromium_os
  71. OWNERS
  72. PRESUBMIT.py
  73. PRESUBMIT_test.py
  74. PRESUBMIT_test_mocks.py
  75. README.md
  76. WATCHLISTS
README.md

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