webview: record histogram for invalid headers.

Check the useragent set by apps to see if it's valid (as per the simple
rules from //net), and if not, see if there's a plausible interpretation
of the string as an attempt to do something clever or if it just looks
like nonsense.

Also check headers passed to loadUrl() for validity, but since apps can
already add arbitrary headers here, just record a boolean histogram for
valid/invalid as there's no reason to allow creative uses.

Fixed: 1108405
Bug: 1105745
Change-Id: Iba562c2b9b17b0615e48dee5c58bd4b435b79442
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2355049
Commit-Queue: Richard Coles <[email protected]>
Auto-Submit: Richard Coles <[email protected]>
Reviewed-by: Steven Holte <[email protected]>
Reviewed-by: David Van Cleve <[email protected]>
Reviewed-by: Nate Fischer <[email protected]>
Cr-Commit-Position: refs/heads/master@{#801435}
4 files changed
tree: 14c27b8faf0074f2045eaa81b0376eb8c340a370
  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. components/
  14. content/
  15. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. jingle/
  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. .vpython
  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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For historical reasons, there are some small top level directories. Now the guidance is that new top level directories are for product (e.g. Chrome, Android WebView, Ash). Even if these products have multiple executables, the code should be in subdirectories of the product.