[sessionmgr][refactor] Implement Ledger-backed storage.

This stores only those fields in StoryModel in use right now:
runtime_state and visibility_state. They are stored in a device-local
prefix of the page.

Note that this will replace most if not all of StoryStorage entirely
once all of its data has been migrated into StoryModel.

TEST=ledger_story_model_storage_unittest
MF-152 #comment [sessionmgr][refactor] Implement Ledger-backed storage.

Change-Id: Ia96e581aaa633abb3b9c90e907be18dac1772e75
5 files changed
tree: 7c330b76c8b7a21368d5405fa292b5fbd4355fe9
  1. .clang-format
  2. .clang-tidy
  3. .gitignore
  4. AUTHORS
  5. BUILD.gn
  6. CONTRIBUTING.md
  7. LICENSE
  8. PATENTS
  9. README.md
  10. bin/
  11. boards/
  12. build/
  13. cloud/
  14. docs/
  15. examples/
  16. infra/
  17. lib/
  18. navbar.md
  19. packages/
  20. products/
  21. public/
  22. tests/
  23. third_party/
  24. web/
README.md

Peridot

Peridot is a framework for composed, intelligent and distributed user experiences.

Applications not explicitly designed to interoperate (and possibly implemented in different programming languages) are ephemerally downloaded and dynamically composed to run in a shared context. The framework manages application lifecycle, resources and view hierarchy; and well as context and suggestion infrastructure.

State of Peridot experiences is transparently synchronized across user devices using a distributed offline-first storage system.

Read more