[iOS] Implement the OptGuide tab helper

The OptimizationGuideTabHelper observes the navigations and forwards to
the OptGuide service. This tab helper also has logic to maintain the
redirect url chain from the navigations, and also keeps the navigation
data of pending navigations.

Bug: 1232857
Change-Id: Ie39aacab248c53cfbee3120ff22fa0c0a54bd728
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3098653
Commit-Queue: rajendrant <[email protected]>
Reviewed-by: Robert Ogden <[email protected]>
Reviewed-by: Rohit Rao <[email protected]>
Reviewed-by: Sophie Chang <[email protected]>
Cr-Commit-Position: refs/heads/main@{#914548}
7 files changed
tree: 2a2991751a45157007c07d838baa77e241069611
  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. cloud_print/
  13. codelabs/
  14. components/
  15. content/
  16. courgette/
  17. crypto/
  18. dbus/
  19. device/
  20. docs/
  21. extensions/
  22. fuchsia/
  23. gin/
  24. google_apis/
  25. google_update/
  26. gpu/
  27. headless/
  28. infra/
  29. ios/
  30. ipc/
  31. jingle/
  32. media/
  33. mojo/
  34. native_client_sdk/
  35. net/
  36. pdf/
  37. ppapi/
  38. printing/
  39. remoting/
  40. rlz/
  41. sandbox/
  42. services/
  43. skia/
  44. sql/
  45. storage/
  46. styleguide/
  47. testing/
  48. third_party/
  49. tools/
  50. ui/
  51. url/
  52. weblayer/
  53. .clang-format
  54. .clang-tidy
  55. .eslintrc.js
  56. .git-blame-ignore-revs
  57. .gitattributes
  58. .gitignore
  59. .gn
  60. .mailmap
  61. .vpython
  62. .vpython3
  63. .yapfignore
  64. AUTHORS
  65. BUILD.gn
  66. CODE_OF_CONDUCT.md
  67. codereview.settings
  68. DEPS
  69. DIR_METADATA
  70. ENG_REVIEW_OWNERS
  71. LICENSE
  72. LICENSE.chromium_os
  73. OWNERS
  74. PRESUBMIT.py
  75. PRESUBMIT_test.py
  76. PRESUBMIT_test_mocks.py
  77. README.md
  78. WATCHLISTS
README.md

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