frame: Make FrameAnimatorView not change overall opacity

FrameAnimatorView is used when animating dark/light mode theme
switches. As part of this, it uses two layers - one with the old theme
setting, and one with the new. It then fades between these by changing
the opacity.

However, if the existing layer has had its opacity changed, then this
transition animation will effectively override the old opacity setting.
This change makes it so that the opacity of the new layer ends up
matching whatever the old layer had.

BUG=b:281152594

Change-Id: Ia1bd9a8f5013f2d6ac569dcd050754f1b9048364
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4508701
Commit-Queue: Daniel Andersson <dandersson@chromium.org>
Reviewed-by: Yongshun Liu <yongshun@chromium.org>
Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1142303}
1 file changed
tree: c511f6df7d8c0f5114a4a2e010a973d8bed07a3c
  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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