Intent of sizeUtils.ts ×1

All 3 exact tests in this concept. Every test is marked by where it enters the hierarchy.

mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/ 3 tests
- platform/ 3 tests
  - theme/ 3 tests
    
    test/ 3 tests
    
    common/ 3 tests
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/theme/test/common/sizeRegistry.test|title=Size Registry deregisterSize should remove a size token|occurrence=1 Introduced here
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/theme/test/common/sizeRegistry.test|title=Size Registry registerSize should register a size token|occurrence=1 Introduced here
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/theme/test/common/sizeRegistry.test|title=Size Registry registerSize should work with sizeForAllThemes|occurrence=1 Introduced here