Remove the CSS Properties API

third_party/WebKit/Source/core/core.gypi

 {
     'includes': [
         'core_generated.gypi',
     ],
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/KeyframeEffect.idl',
             'animation/EffectModel.idl',
             'animation/AnimationEffectReadOnly.idl',
@@ skipping 1407 matching lines @@
             'css/parser/CSSSupportsParser.cpp',
             'css/parser/CSSSupportsParser.h',
             'css/parser/CSSTokenizer.cpp',
             'css/parser/CSSTokenizerInputStream.cpp',
             'css/parser/CSSVariableParser.cpp',
             'css/parser/CSSVariableParser.h',
             'css/parser/MediaQueryBlockWatcher.cpp',
             'css/parser/MediaQueryParser.cpp',
             'css/parser/SizesAttributeParser.cpp',
             'css/parser/SizesCalcParser.cpp',
-            'css/properties/CSSPropertyDescriptor.h',
-            'css/properties/CSSPropertyDescriptor.cpp',
-            'css/properties/CSSPropertyFunctions.h',
             'css/resolver/AnimatedStyleBuilder.cpp',
             'css/resolver/AnimatedStyleBuilder.h',
             'css/resolver/CSSToStyleMap.cpp',
             'css/resolver/CSSToStyleMap.h',
             'css/resolver/CSSVariableResolver.cpp',
             'css/resolver/CSSVariableResolver.h',
             'css/resolver/ElementResolveContext.cpp',
             'css/resolver/ElementResolveContext.h',
             'css/resolver/ElementStyleResources.cpp',
             'css/resolver/ElementStyleResources.h',
@@ skipping 2799 matching lines @@
             'testing/PrivateScriptTestTest.cpp',
             'timing/MemoryInfoTest.cpp',
             'timing/PerformanceBaseTest.cpp',
             'timing/PerformanceObserverTest.cpp',
             'workers/WorkerThreadTest.cpp',
             'workers/WorkerThreadTestHelper.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }