[scenic] Isolate FrameScheduler

This CL:
* Collect scheduling logic in FrameScheduler
* Decouple Session updates from calls to RenderFrame()
* Simplify program flow from Present() to RenderFrame():
     Previously: Client Session -> SessionHandler -> gfx::Session
              -> SessionManager -> Engine -> FrameScheduler -> Engine
              -> SessionManager -> gfx::Session

     Now: Client Session -> SessionHandler -> gfx::Session
          -> FrameScheduler -> Engine -> gfx::Session

Change-Id: I3000b19fe7836a34595354eea57fe34744fa45eb
27 files changed
tree: fc3888354fcfc138c370c0a21d88a3725eb5ba6b
  1. boards/
  2. build/
  3. buildtools/
  4. bundles/
  5. docs/
  6. garnet/
  7. peridot/
  8. products/
  9. scripts/
  10. sdk/
  11. src/
  12. zircon/
  13. .clang-format
  14. .dir-locals.el
  15. .gitattributes
  16. .gitignore
  17. .gn
  18. AUTHORS
  19. CODE_OF_CONDUCT.md
  20. CONTRIBUTING.md
  21. LICENSE
  22. OWNERS
  23. PATENTS
  24. README.md
  25. rustfmt.toml
README.md

Fuchsia

Pink + Purple == Fuchsia (a new operating system)

What is Fuchsia?

Fuchsia is a modular, capability-based operating system. Fuchsia runs on modern 64-bit Intel and ARM processors.

Fuchsia is an open source project with a code of conduct that we expect everyone who interacts with the project to respect.

How can I build and run Fuchsia?

See Getting Started.

Where can I learn more about Fuchsia?

See the documentation.