[Payment] Launch enforcing Content Security Policy

Before this patch, calling `new PaymentRequest(https://example.test)`
would always ping https://example.test, even if the Content Security
Policy (CSP) prohibited connections to that URL.

This patch launches the enforcement of CSP in the Web Payment API.

After this patch, if CSP connect-src directive blocks access to
https://example.test, then calling
`new PaymentRequest(https://example.test)` will not ping the blocked
URL, `PaymentRequest.canMakePayment()` will return "false" and
`PaymentRequest.show()` will return "NotSupportedError", unless the user
has the temporary flag chrome://flags/#ignore-csp-in-web-payment-api
enabled or the website participates in the (temporary) reverse origin
trial.

Chrome status:
https://chromestatus.com/feature/6286595631087616

Intent:
https://groups.google.com/a/chromium.org/g/blink-dev/c/mlTnVIovBc0/m/uWMMIM2MCAAJ

Launch:
http://launch/4200427

Bug: 1013080, 1349091
Change-Id: I483a97503bc646384a565b766124c0d9f64bed84
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4139782
Reviewed-by: Mason Freed <masonf@chromium.org>
Commit-Queue: Rouslan Solomakhin <rouslan@chromium.org>
Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1091086}
10 files changed
tree: e62b7f0b5918d024a035bad78c4ab86b31e742b5
  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. ATL_OWNERS
  63. AUTHORS
  64. BUILD.gn
  65. CODE_OF_CONDUCT.md
  66. codereview.settings
  67. DEPS
  68. DIR_METADATA
  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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