Revert of Calculate paint invalidation rect for scrollbars

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 1974 matching lines @@
             'paint/NinePieceImageGrid.cpp',
             'paint/NinePieceImageGrid.h',
             'paint/NinePieceImagePainter.cpp',
             'paint/NinePieceImagePainter.h',
             'paint/ObjectPaintProperties.cpp',
             'paint/ObjectPaintProperties.h',
             'paint/ObjectPainter.cpp',
             'paint/ObjectPainter.h',
             'paint/PaintInfo.cpp',
             'paint/PaintInfo.h',
-            'paint/PaintInvalidationCapableScrollableArea.cpp',
-            'paint/PaintInvalidationCapableScrollableArea.h',
             'paint/PaintLayer.cpp',
             'paint/PaintLayerClipper.cpp',
             'paint/PaintLayerFilterInfo.cpp',
             'paint/PaintLayerFilterInfo.h',
             'paint/PaintLayerFragment.h',
             'paint/PaintLayerReflectionInfo.cpp',
             'paint/PaintLayerPainter.cpp',
             'paint/PaintLayerPainter.h',
             'paint/PaintLayerPaintingInfo.h',
             'paint/PaintLayerScrollableArea.cpp',
@@ skipping 1916 matching lines @@
             'style/SVGComputedStyleTest.cpp',
             'svg/SVGPathParserTest.cpp',
             'svg/UnsafeSVGAttributeSanitizationTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'timing/MemoryInfoTest.cpp',
             'workers/WorkerThreadTest.cpp',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }