Build Safe Browsing download protection on Android (5/6)

This is part 5 of 6 for building code for download protection on
Android. The overall strategy is to define a new buildflag,
SAFE_BROWSING_DOWNLOAD_PROTECTION, and use it to guard all
code related to Safe Browsing download protection, and then
add Android to the platforms on which it is true.

In this CL, code related to download protection functionality for
programmatic file writes (from PPAPI, filechooser, File System Access)
is switched to use this new buildflag. This is in preparation for
a later CL which will start defining the buildflag on Android.

Bug: 397407934
Change-Id: I669cee7b9b5c03bfafe7a07602601db60256c503
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6293265
Commit-Queue: Lily Chen <chlily@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1424218}
5 files changed
tree: 3d87fa6efb0e47f34103070baecfea34d136e4f8
  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. crypto/
  16. dbus/
  17. device/
  18. docs/
  19. extensions/
  20. fuchsia_web/
  21. gin/
  22. google_apis/
  23. gpu/
  24. headless/
  25. infra/
  26. ios/
  27. ipc/
  28. media/
  29. mojo/
  30. native_client_sdk/
  31. net/
  32. pdf/
  33. ppapi/
  34. printing/
  35. remoting/
  36. rlz/
  37. sandbox/
  38. services/
  39. skia/
  40. sql/
  41. storage/
  42. styleguide/
  43. testing/
  44. third_party/
  45. tools/
  46. ui/
  47. url/
  48. webkit/
  49. .clang-format
  50. .clang-tidy
  51. .clangd
  52. .git-blame-ignore-revs
  53. .gitallowed
  54. .gitattributes
  55. .gitignore
  56. .gitmodules
  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. CPPLINT.cfg
  68. CRYPTO_OWNERS
  69. DEPS
  70. DIR_METADATA
  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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