[ios] Fix hover effect for identity button

This CL fixes the hover effect of the identity button to match the
shape of the identity image.
There is no visible change on iPad.
Note that the clickable area is now smaller (with old implementation
all the square area around the button was clickable).

Old implementation:
 - Size of the image
 - Margin (16pt)

New implementation:
- Size of the image
- Margin (8pt)
- Padding (8pt)

As a result the clickable area will be 8pt*2 = 16pt smaller
(from 64pt to 48pt).
A screenshot of the new behavior can be found in the bug page.

Bug: 324051579
Change-Id: I3492447f779031bb6dfa0f388ddc8fa8930236cf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5268822
Commit-Queue: Federica Germinario <fedegermi@google.com>
Reviewed-by: Scott Yoder <scottyoder@google.com>
Reviewed-by: Asami Doi <asamidoi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1257846}
5 files changed
tree: 38ca9b998f14330695751c13aab0f45d4be09d26
  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. webkit/
  51. .clang-format
  52. .clang-tidy
  53. .clangd
  54. .eslintrc.js
  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. DEPS
  71. DIR_METADATA
  72. LICENSE
  73. LICENSE.chromium_os
  74. OWNERS
  75. PRESUBMIT.py
  76. PRESUBMIT_test.py
  77. PRESUBMIT_test_mocks.py
  78. README.md
  79. WATCHLISTS
README.md

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