[tool] Migrate Cache.flutterRoot static state to instance configuration - #190795

flutter/flutter@5e805bf...ee8b482

2026-10-31 [email protected] Roll Skia from 9bab765df357 to 607de4b035dc (1 revision) (flutter/flutter#195728)
2026-10-31 [email protected] Roll Skia from 284054bec98a to 9bab765df357 (2 revisions) (flutter/flutter#195726)
2026-10-31 [email protected] Roll Skia from 3a3f56f7ddd4 to 284054bec98a (1 revision) (flutter/flutter#195724)
2026-10-31 [email protected] Roll Skia from 466994d27b1e to 3a3f56f7ddd4 (1 revision) (flutter/flutter#195719)
2026-10-30 [email protected] Fix XcodeProjectInterpreter dependency cycle in flutter_tools (flutter/flutter#195694)
2026-10-30 [email protected] Document that Positioned also works inside an Overlay (flutter/flutter#190607)
2026-10-30 [email protected] Roll Skia from ce0b85b46db6 to 466994d27b1e (3 revisions) (flutter/flutter#195711)
2026-10-30 [email protected] Adds Vulkan sync validation test run (flutter/flutter#195596)
2026-10-30 [email protected] [Android] Let the raster thread use every core of a chip without little cores (flutter/flutter#195071)
2026-10-30 [email protected] Roll Skia from 121d04c01e2d to ce0b85b46db6 (6 revisions) (flutter/flutter#195699)
2026-10-30 [email protected] [web] Anchor platform view slots to top-left to fix RTL document layout (flutter/flutter#194601)
2026-10-30 [email protected] Update golden file testing docs (flutter/flutter#195449)
2026-10-30 [email protected] [tool] Migrate Cache.flutterRoot static state to instance configuration (flutter/flutter#190795)
2026-10-30 [email protected] Apply view metrics overrides below the framework (flutter/flutter#194311)
2026-10-30 [email protected] Roll Skia from c0c46ee9f938 to 121d04c01e2d (9 revisions) (flutter/flutter#195687)
2026-10-30 [email protected] Use uniforms in the Porter Duff blend shader instead of specialization constants (flutter/flutter#195458)
2026-10-30 [email protected] [flutter_tools] Inject dependencies into iOS, macOS, and Windows application packages (flutter/flutter#194047)

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…on (flutter#190795)

Replaces static `Cache.flutterRoot` state and ambient `globals` usage
across `Cache` and its callers with instance configuration and explicit
`ToolContext` dependency injection, and consolidates `ToolContext`
parameter passing across call sites.

Part of flutter#47161

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] All existing and new tests are passing.