Add UMAs about the usage of the WebCrypto deriveBits operation

We are discussing [1] a backwards-incompatible change in the Web
Cryptography API spec to modify the length parameter of the deriveBits
operation.

This CL adds counters to measure the usage of this operation with
2 different values. The first one is to detect '0', which cam be passed
explicitly or coercer due to 'undefined' or 'null' values. The other
counter wants to evalue values that may cause the derived bits to be
truncated; this affects the ECDH and X2519 algorithms.

[1] https://github.com/w3c/webcrypto/issues/322

Bug: 1439774
Change-Id: Iffba1d167144aef25b35821acd955b221b395628
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5004678
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: David Benjamin <davidben@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Javier Fernandez <jfernandez@igalia.com>
Cr-Commit-Position: refs/heads/main@{#1227708}
15 files changed
tree: 4910ce23d1dffcc869f538daa1f84918f39258fc
  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. webkit/
  51. .clang-format
  52. .clang-tidy
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  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. DEPS
  69. DIR_METADATA
  70. LICENSE
  71. LICENSE.chromium_os
  72. OWNERS
  73. PRESUBMIT.py
  74. PRESUBMIT_test.py
  75. PRESUBMIT_test_mocks.py
  76. README.md
  77. WATCHLISTS
README.md

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