Revert of Retry "Replace RenderFullScreen with top layer"

Source/core/core.gypi

 {
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/Animation.idl',
             'animation/Player.idl',
             'animation/TimedItem.idl',
             'css/CSS.idl',
             'css/CSSCharsetRule.idl',
             'css/CSSFontFaceLoadEvent.idl',
@@ skipping 1417 matching lines @@
             'rendering/RenderFileUploadControl.cpp',
             'rendering/RenderFileUploadControl.h',
             'rendering/RenderFlexibleBox.cpp',
             'rendering/RenderFlexibleBox.h',
             'rendering/RenderFlowThread.cpp',
             'rendering/RenderFlowThread.h',
             'rendering/RenderFrame.cpp',
             'rendering/RenderFrame.h',
             'rendering/RenderFrameSet.cpp',
             'rendering/RenderFrameSet.h',
+            'rendering/RenderFullScreen.cpp',
+            'rendering/RenderFullScreen.h',
             'rendering/RenderGeometryMap.cpp',
             'rendering/RenderGeometryMap.h',
             'rendering/RenderGrid.cpp',
             'rendering/RenderGrid.h',
             'rendering/RenderHTMLCanvas.cpp',
             'rendering/RenderHTMLCanvas.h',
             'rendering/RenderIFrame.cpp',
             'rendering/RenderIFrame.h',
             'rendering/RenderImage.cpp',
             'rendering/RenderImageResource.cpp',
@@ skipping 1815 matching lines @@
             'html/parser/HTMLParserThreadTest.cpp',
             'html/track/vtt/BufferedLineReaderTest.cpp',
             'html/track/vtt/VTTScannerTest.cpp',
             'rendering/RenderOverflowTest.cpp',
             'rendering/shapes/BoxShapeTest.cpp',
             'testing/UnitTestHelpers.cpp',
             'testing/UnitTestHelpers.h',
         ],
     }
 }