wallpaper: download custom wallpaper from Drive

Custom wallpaper sync previously copied file from the local mirror
on-disk. However, this file is frequently out of date with respect to
the actual file on Drive. When the wallpaper.jpg file is changed on
Drive, it may take several minutes to propagate down to the filesystem.

To reduce the potential for mismatched files, download the file directly
from Drive.

BUG=b:245611754
TEST=set wallpaper on device A, syncs to device B on next login

Change-Id: Ie7aee7092db1e7823af21185f5ad63b120b8e5b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4062411
Reviewed-by: Olesia Marukhno <olesiamarukhno@google.com>
Commit-Queue: Jeffrey Young <cowmoo@google.com>
Reviewed-by: Austin Tankiang <austinct@chromium.org>
Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1084482}
10 files changed
tree: d18656573202e14f5bea163b98b211011df9d2be
  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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