Match sidepanel fre loader to spec

Match sidepanel fre loading UI to spec. The fre popup panel's loading
state formatting is unchanged (demo'ed in screenshots).

Figma with mocks linked in bug.

GlicUnifiedFreScreen enabled
sidepanel fre before: screenshot.googleplex.com/64RcVTdzjxcDmJU.png
sidepanel fre after: screenshot.googleplex.com/3xDs4sPWWvWh9Ct.png

GlicUnifiedFreScreen disabled
popup before: screenshot.googleplex.com/7UnvoJ2Bqii8pVx.png
popup after: screenshot.googleplex.com/3HJ6zQwEUKDhgXq.png

Bug: 458063720
Change-Id: I22ff5b2d1d3aa0bf5c7b410e41ffec97a39df579
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7133221
Reviewed-by: Dan Harrington <harringtond@chromium.org>
Auto-Submit: Andrea Gomez <andreaxg@google.com>
Commit-Queue: Andrea Gomez <andreaxg@google.com>
Cr-Commit-Position: refs/heads/main@{#1544366}
4 files changed
tree: 5b175d761e0ab39bb3f3527502ab748ab6d36c4f
  1. .gemini/
  2. .github/
  3. agents/
  4. android_webview/
  5. apps/
  6. ash/
  7. base/
  8. build/
  9. build_overrides/
  10. buildtools/
  11. cc/
  12. chrome/
  13. chromecast/
  14. chromeos/
  15. codelabs/
  16. components/
  17. content/
  18. crypto/
  19. dbus/
  20. device/
  21. docs/
  22. extensions/
  23. fuchsia_web/
  24. gin/
  25. google_apis/
  26. gpu/
  27. headless/
  28. infra/
  29. ios/
  30. ipc/
  31. media/
  32. mojo/
  33. net/
  34. pdf/
  35. printing/
  36. remoting/
  37. rlz/
  38. sandbox/
  39. services/
  40. skia/
  41. sql/
  42. storage/
  43. styleguide/
  44. testing/
  45. third_party/
  46. tools/
  47. ui/
  48. url/
  49. webkit/
  50. .clang-format
  51. .clang-tidy
  52. .clangd
  53. .cursorignore
  54. .geminiignore
  55. .git-blame-ignore-revs
  56. .gitallowed
  57. .gitattributes
  58. .gitignore
  59. .gitmodules
  60. .gn
  61. .mailmap
  62. .rustfmt.toml
  63. .vpython3
  64. .yapfignore
  65. ATL_OWNERS
  66. AUTHORS
  67. BUILD.gn
  68. CODE_OF_CONDUCT.md
  69. codereview.settings
  70. CPPLINT.cfg
  71. CRYPTO_OWNERS
  72. DEPS
  73. DIR_METADATA
  74. LICENSE
  75. LICENSE.chromium_os
  76. OWNERS
  77. PRESUBMIT.py
  78. PRESUBMIT_test.py
  79. PRESUBMIT_test_mocks.py
  80. README.md
  81. SECURITY_OWNERS
  82. WATCHLISTS
README.md

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