#54233: build: read the macOS resource allowlist from the linked framework
Description of Change
grit's --allowlist-support markers are __attribute__((used)), so on macOS every ui::AllowlistedResource<id> the framework references survives the link as a symbol; ICF folds the bodies, not the names (an official arm64 framework has ~5,400 of them on 5 addresses). The mac allowlist is now read back from the linked Electron Framework with llvm-nm - from the dSYM when the framework itself is stripped - instead of pseudo-linking the framework's inputs through a patched linker_driver.py, and the framework's bundle-only deps (paks, xibs, helper and dylib copies) move to bundle_deps so the locale repack can depend on the link without a cycle and without that bundle_data leaking to other consumers of the paks. Linux keeps the input-scan path.
That removes the linker_driver.py --collect-inputs-only mode and the tools/resources/ar.py archive handling from patches/chromium; what remains is the gcc_toolchain.gni assert admitting Linux and macOS (that file also declares the arg grit's markers key off, so mac still needs it), and the Linux half of that is https://chromium-review.googlesource.com/c/chromium/src/+/8360559.
Checklist
- PR description included and stakeholders cc'd
- I have reviewed and verified the changes
Release Notes
Notes: none
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Semver Impact
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- Major (X.y.z): Breaking changes that may require code modifications
- Minor (x.Y.z): New features that maintain backward compatibility
- Patch (x.y.Z): Bug fixes that don't change the API
- None: Changes that don't affect using facing parts of Electron