[DownloadBubble] Open history loaded pdfs in Chrome

Downloads loaded from history service do not have
should_prefer_opening_in_browser_ set. This CL sets that field for
downloads lazily, i.e when used. This happens when the context menu is
being created or when downloads are being opened.

Call DetermineIfHandledSafelyHelper synchronously from DownloadItemModel::ShouldPreferOpeningInBrowser as
the callers for download opening and context menu creation expect the
response synchronously.

Enable the change only under DownloadBubbleV2, to allow for
experimentation for effect.

Screencasts
With fix: http://go/scrcast/NjQzNDAzMzM4Mzc2ODA2NHw4ZTA4YzM1Ny0xYg
Without fix: http://go/scrcast/NTcyNjc2NTMxNDk5ODI3Mnw1MGJhNjU2ZS1kNQ

Bug: 1352120
Change-Id: I9275b78920c9874c49d7570a83e49e5b42ca03b7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3852182
Commit-Queue: Rohit Bhatia <bhatiarohit@google.com>
Reviewed-by: Min Qin <qinmin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1042374}
10 files changed
tree: ce4523ef71ca286beae486a2c2174619cd35cf02
  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. .vpython
  61. .vpython3
  62. .yapfignore
  63. AUTHORS
  64. BUILD.gn
  65. CODE_OF_CONDUCT.md
  66. codereview.settings
  67. DEPS
  68. DIR_METADATA
  69. ENG_REVIEW_OWNERS
  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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