[simple_browser] Tab Rearrangement (1/4)

- Implement the Bloc and Action part of the tab rearrangement
(fxb/45236)
- Design doc: https://docs.google.com/document/d/1MUEbx9lvaI5SLZz_cZLSLV9PSo0xY1845qSkQj6oqIw/edit#heading=h.mhfj5ekqrn7l
- Added relevant unit tests to tabs_bloc_test.dart
- minor: also fixed some text styles in tabs_widget.dart

Change-Id: Ie17cb31cf82132a604e9ebf22af2f1973d0e9b14
4 files changed
tree: 3357dce27b6269176afe2b1c17d3f8385dcf00f8
  1. base_shells/
  2. benchmarks/
  3. bin/
  4. examples/
  5. lib/
  6. session_shells/
  7. settings/
  8. story_shells/
  9. tests/
  10. .gitignore
  11. analysis_options.yaml
  12. AUTHORS
  13. BUILD.gn
  14. CONTRIBUTING.md
  15. LICENSE
  16. OWNERS
  17. PATENTS
  18. README.md
README.md

Fuchsia Open Source Template Repository

This repository is a template that we will use when creating new open source repositories for Fuchsia.